Lucca M58 Sunto vs ECM Synchronika ii — Which E61 Dual-Boiler Espresso Machine Should I Choose?

Close up of a Lucca espresso machine with chrome fittings and wooden portafilter handles on a wooden counter
Quick Take

For most home baristas, the LUCCA M58 Sunto is the better choice over the ECM Synchronika II. Both are true E61 dual boiler machines with PID temperature control. Still, the M58 Sunto pulls ahead in daily use: a dedicated group-head heating element brings it to full brew temperature about 40% faster than a standard E61 and keeps it stable even through long gaps between shots, while its OLED PID and programmable pre-infusion make for a cleaner, more modern workflow. We designed it in Portland and built it by Quick Mill in Milan, specifically to solve frustrations like E61 heat-soak and idle drift. The exception: if hands-on pressure profiling excites you, the Synchronika II with Flow Control offers a paddle-operated needle valve for real-time flow control. Though the M58 Sunto is available with flow control too, so you don't have to give up its workflow edge to get it. Without flow control, the standard Synchronika II is harder to justify over the M58 Sunto at a similar price.

These are two of the best E61 dual boiler espresso machines you can buy for home use, and if you've narrowed your search to the LUCCA M58 Sunto and the ECM Synchronika II, you've already done most of the hard work. Both machines deliver commercial-grade temperature stability, simultaneous brewing and steaming, and build quality that lasts a decade or more. But they're not interchangeable, and the right choice depends on how you actually make espresso at home: your workflow habits, your interest in shot profiling, and whether you value a streamlined experience or maximum manual control. By the end of this guide, you'll know exactly which machine fits your counter and your style.

The Short Answer

Close up of the LUCCA M58 Sunto espresso machine front showing chrome levers with walnut wood handles and a polished stainless body

If you want an E61 dual-boiler designed from the ground up for the home barista's daily workflow, with smart engineering choices that simplify your routine without sacrificing quality, the LUCCA M58 Sunto is the machine we'd point you to. We designed it ourselves, right here in Portland, and have it built exclusively by Quick Mill in Milan, specifically to solve frustrations we kept hearing from customers and experiencing ourselves. It's a machine built around the idea that you shouldn't need to be an engineer to pull an exceptional shot before work.

The ECM Synchronika II is a beautifully constructed German machine with a loyal following, and the Flow Control version adds genuine shot-profiling capability for baristas who want to manipulate pressure in real time. It's a serious piece of equipment. But for most home baristas, especially those who prioritize consistency, a clean daily workflow, and long-term reliability without tinkering, the M58 Sunto earns our recommendation. Here's why.

The Five Factors That Actually Matter

Hand inserts a stainless portafilter into a chrome LUCCA M58 Sunto espresso machine with walnut trim

1. Boiler design and temperature stability. Both machines are true dual boiler designs, meaning you have one boiler dedicated to brewing and a separate one for steam. This is the architecture that matters most for espresso quality, because it means your brew temperature stays rock-steady even while you're steaming milk. Both use the classic E61 group head with PID control. Here's where the M58 Sunto pulls ahead: it adds a dedicated heating element built into the group head, which brings it to full brewing temperature in about 12 minutes, roughly 40% faster than a standard E61 machine. This directly addresses the classic E61 quirk, where the heavy brass group requires a long heat soak and can be sensitive to idle time between shots. Both machines hold brew temperature within a narrow, repeatable window once warmed up, but the M58 Sunto gets you there faster and stays more stable through long gaps between pulls.

2. Workflow and daily usability. This is where the M58 Sunto's purpose-built design truly stands out. When we sat down to design the LUCCA line, we weren't trying to build a machine that would impress other engineers; we were trying to build one that a real person would love using at 6:30 a.m. The M58 Sunto features an OLED PID display with 0.1°C accuracy, an integrated shot timer, and programmable pre-infusion, so you can gently saturate the puck before applying full pressure for more even extraction and precisely dial in your routine. The Synchronika II, in its standard configuration, is a more hands-on, manual experience. That's not a flaw; some people genuinely prefer that control. But the M58 Sunto's modern interface and programmable features make the daily routine smoother, especially when you're moving quickly.

3. Flow control and shot profiling. The ECM Synchronika II is available in a dedicated Flow Control version, which adds a paddle-operated needle valve to the E61 group. This lets you manually adjust the flow rate of water hitting the puck in real time: starting with a slow pre-infusion, ramping up to full pressure, and declining toward the end of the shot. It's a genuinely powerful tool for experienced baristas who want to explore pressure profiling. Worth knowing: the M58 Sunto is also available with flow control, using our pre-installed LUCCA E61 stainless steel flow control device, so you don't have to choose between the M58 Sunto's workflow advantages and real-time flow manipulation. The honest question is whether you actually want to stand at your machine adjusting a paddle through every shot, or whether you want excellent, repeatable espresso with less intervention. Either way, both machines can be configured for it.

4. Build quality and longevity. Both machines are built to last. The ECM Synchronika II is manufactured in Heidelberg, Germany, with stainless steel panels, a polished stainless-steel or black housing, and ECM's characteristic precision. The LUCCA M58 Sunto is built for us by Quick Mill in Milan with heavy-gauge stainless steel, insulated stainless steel dual boilers, and an emphasis on serviceability, meaning that when a machine eventually needs maintenance, and they all do after years of daily use, it's straightforward to work on. We've torn both machines apart more times than we can count, and we stand behind both. One thing the M58 Sunto offers that no ECM machine does: handcrafted walnut touchpoints come standard, with the option of a sleek matte-black-and-walnut finish. It's the kind of detail that reflects how we think about the entire ownership experience, not just what's inside the boiler, but how the machine lives on your counter.

5. Price and value. The ECM Synchronika II is competitively priced for a premium E61 dual boiler, and the Flow Control version commands a premium on top of that. The LUCCA M58 Sunto sits in a similar range. At this level, you're not choosing between good and bad; you're choosing between two genuinely excellent machines with different philosophies. The M58 Sunto's value proposition is that we control the design, the spec, and the support experience end-to-end. When you call us with a question about your M58 Sunto, you're talking to the people who designed it. That's not something you get when you buy a machine from a company that's simply reselling another manufacturer's product.

What We Recommend, and For Whom

The LUCCA M58 Sunto is our top recommendation for the home barista seeking a dual-boiler machine that delivers exceptional espresso with a refined, efficient workflow. Its dedicated group-head heater for fast, stable heat-up, OLED PID control, programmable pre-infusion, and thoughtful design make it the kind of machine you happily reach for every morning without fuss. It's the machine we designed because we couldn't find exactly what we wanted from anyone else, and, based on our customers' responses, we weren't the only ones who felt that way.

The ECM Synchronika II with Flow Control is the right pick for the home barista who has a strong grinder, some experience dialing in shots, and a genuine desire to experiment with pressure profiling. It's a beautifully built machine with real depth for someone who sees espresso-making as an active, hands-on craft. If you want to manipulate every variable, it gives you the tools, though it's worth remembering that the M58 Sunto also offers a flow control option.

The ECM Synchronika II (standard, without Flow Control) is a solid dual boiler E61 with clean German engineering. Still, at its price point and without the flow control feature, we think the M58 Sunto offers a more compelling package for most home users: faster, more stable heat-up, a more modern interface, and the direct support relationship that comes with buying a machine we designed ourselves.

What Most Comparison Guides Get Wrong

The biggest mistake we see in E61 dual boiler comparisons is treating every machine in this category as essentially the same because they share the E61 group head. They're not. The E61 is a brew group design, a well-proven one, but what surrounds it matters enormously. Boiler material, group head heating method, pre-infusion implementation, PID tuning, plumbing layout, and even the quality of the solenoid valve all vary from machine to machine and directly affect what ends up in your cup. The M58 Sunto's dedicated group-head heating element is a perfect example: it's still an E61, but it behaves very differently from a standard E61 at startup and during idle gaps. Saying "they're both E61 dual boilers, so they'll taste the same" is like saying two cars with the same engine displacement will drive identically. The M58 Sunto and the Synchronika II share a category, but they were designed with different priorities, and those priorities show up in daily use.

The other thing most guides skip entirely is what happens after you buy. A dual boiler at this price point is a long-term commitment, and the quality of support you get, from dialing in your grinder on day one to troubleshooting a maintenance question in year five, matters as much as the spec sheet. When you buy a LUCCA machine from us, our team will get on the phone and walk you through your first shots, help you adjust your dose and grind, and make sure you're pulling espresso you're genuinely proud of. We do this because we think the machine is only half the equation. The other half is knowing how to use it well. It's also why we recommend protecting your investment with filtered, soft water in the 35-85 ppm range from day one, regardless of which machine you choose.

The Bottom Line

For most home baristas choosing between these two machines, the LUCCA M58 Sunto is the better buy. It offers faster, more stable heat-up through its dedicated group-head heating element, a more modern and efficient daily workflow thanks to its OLED PID and programmable pre-infusion, and the direct backing of the team that designed it, including the kind of post-purchase support that actually helps you make better espresso, not just own a nicer machine. If hands-on pressure profiling is a genuine priority, both the M58 Sunto and the Synchronika II are available with flow control so that you can have that capability either way. But if your goal is simply the best espresso you can make at home, morning after morning, with a machine that works with you instead of making you work for it, we'd put the M58 Sunto on your counter. It's the machine we built for exactly that reason. 

Frequently Asked Questions

Is flow control on an E61 espresso machine worth it for a home barista?

It depends entirely on whether you want to actively manipulate pressure during every shot. Flow control uses a paddle-operated needle valve to adjust water flow rate in real time — slow pre-infusion, full pressure, then a decline. It's a powerful tool for experienced baristas who enjoy experimenting with pressure profiles. But if that sounds more like homework than fun, you'll get better results from a machine like the LUCCA M58 Sunto that delivers excellent, repeatable espresso with less intervention.

Are all E61 dual boiler espresso machines basically the same?

This is the most common misconception in the category, and it's flat wrong. The E61 is just a brew group design — what surrounds it varies enormously. Boiler material, group head saturation method, pre-infusion implementation, PID tuning, plumbing layout, and solenoid valve quality all differ between machines and directly affect what ends up in your cup. Two E61 dual boilers can produce noticeably different espresso and very different daily experiences.

Which E61 dual boiler espresso machine is best for a busy morning routine?

We recommend the LUCCA M58 Sunto. It features programmable volumetric dosing, so once your shot is dialed in, you press a button, and it stops automatically at your target volume — freeing you to steam milk or make breakfast. Its saturated group head also maintains rock-steady brew temperature without fussing. We designed it in Portland specifically around the home barista's morning workflow, because nobody should need an engineering degree to pull a great shot before work.

How important is post-purchase support when buying a dual boiler espresso machine?

It's as important as the machine itself. A dual boiler is a long-term commitment, and dialing in your grinder, adjusting your dose, and pulling your first truly excellent shot all benefit from expert guidance. When you buy a LUCCA machine from Clive Coffee, our team will get on the phone, walk you through your first shots, and help you dial everything in — because the machine is only half the equation. Knowing how to use it well is the other half.