The LUCCA M58 Sunto with Flow Control ($3,295) and the Lelit Bianca V3 ($2,999.95) are two of the best flow-control E61 dual boilers around $3,000, both Italian-built, both with a paddle for shaping pressure live, both dual-boiler rotary machines with switchable reservoir-or-plumb water. The difference is character: the Sunto with Flow Control is the compact, polished pick, built by Quick Mill in Milan, with an OLED PID, joystick steam and water controls, an included drain kit, walnut trim, and a notably small footprint for an E61 dual boiler. The Bianca V3 is the tinkerer's platform, adding an electronic low-flow mode, four power modes, and a modular reservoir, and it's the machine Clive Coffee's team uses to teach profiling, for about $295 less. Neither offers volumetric dosing; both are about hands-on shot shaping. And if you decide you don't want a paddle at all, the base LUCCA M58 Sunto ($2,995) is the same compact dual boiler with programmable pre-infusion for $300 less. Call Clive Coffee's team to match one to your drinks and counter.
Verdict up front: the LUCCA M58 Sunto with Flow Control ($3,295) and the Lelit Bianca V3 ($2,999.95) are two of the best flow-control E61 dual boilers in the roughly $3,000 class. Both let you shape pressure by hand, both are Italian-built, and both make superb espresso. The Sunto leans toward compact, polished refinement; the Bianca toward modular, tinker-friendly versatility. Here's how to tell which one fits you.
What They Share
Before the differences, it's worth being clear how much these two have in common, because it's most of the machine. Both are dual-boiler, rotary-pump E61 machines with a pre-installed flow-control paddle that lets you manipulate pressure live during extraction, stretch a pre-infusion, ramp pressure slowly, then taper the finish. Both pairs of independent PID controls on separate brew and steam boilers (so you brew and steam at once with no compromise), with a switchable water supply: run on the built-in reservoir now, plumb directly to your line later. Both have a shot timer and programmable pre-infusion, and both are built to last a decade. If you want hands-on pressure profiling in a dual boiler for around $3,000, either one delivers it. What changes is how each machine is built around that paddle.
The LUCCA M58 Sunto with Flow Control ($3,295)
Built by Quick Mill in Milan, the Sunto with Flow Control is the compact, refined take. It pairs a 0.75L brew boiler and a 1.4L steam boiler, each with an independent PID, with a pre-installed LUCCA E61 flow-control paddle, an OLED PID display accurate to 0.1°C, a shot timer, and 2-bar steam. Its standout is how much it packs into a small footprint: it's notably compact for an E61 dual boiler, smaller than the original M58, and a dedicated group-head heating element brings it to brew temperature in about 12 minutes, roughly 40% faster than a standard E61. Nice touches round it out: joystick steam and hot water controls, a drainable drip tray with the drain kit included, walnut trim, and a walnut bottomless 58mm portafilter in the box. It's the pick for the barista who wants flow control plus polish, in the smallest, quietest, most finished package.
The Lelit Bianca V3 ($2,999.95)
The Bianca V3 is the modular, tinker-friendly take, and it's the machine Clive Coffee's team uses to teach pressure profiling in its Coffee School classes. It's an Italian dual boiler (0.8L brew, 1.5L steam) with a rotary pump and a flow-control paddle, and the V3 adds an electronic low-flow mode that can simulate profiles without touching the paddle, plus four power modes (always-on, sleep, eco, standby). Its signature trick is the modular reservoir that detaches when you plumb it in or mounts on either side to fit your counter. If you love to experiment and want the most flexible, hands-on profiling platform at this price, the Bianca is squarely your machine, and at $2,999.95, it's about $295 less than the Sunto with Flow Control.
How to Choose
The decision comes down to what you value once you've decided you want flow control. Choose the LUCCA M58 Sunto with Flow Control if you want the most compact, polished, quietly refined machine, the OLED display, joystick controls, included drain kit, walnut touches, and a small footprint matter to you, and you're happy to pay a bit more for that finish. Choose the Lelit Bianca V3 if you want the tinkerer's platform, electronic low-flow mode, four power modes, a modular reservoir, the profiling machine Clive Coffee teaches on, at a slightly lower price. Neither has volumetric dosing; both are about hands-on, in-the-moment shot shaping.
Don't Want to Pay for a Paddle?
Worth knowing: the Sunto also comes without flow control. The LUCCA M58 Sunto ($2,995) is the same compact dual boiler with programmable pre-infusion in place of the paddle, so if you'd rather have dependable, repeatable shots than shape pressure by hand, you save $300 and lose nothing but the flow control. Many home baristas are happier there. But if hands-on profiling is the thing you're after, the Sunto with Flow Control or the Bianca V3 is where to look.
What Most Guides Get Wrong
Most comparisons treat flow control as an automatic upgrade and stop at the cheapest machine. That misses the real question: it isn't "flow control or not"; it's "will you actually use the paddle?" Flow control is a hands-on instrument that rewards the barista who wants to intervene in every shot, stretching pre-infusion, rescuing a stubborn light roast, chasing a sweeter extraction. If that's you, both machines are excellent, and the choice comes down to build and workflow: the Sunto's compact polish versus the Bianca's modular flexibility. But if you suspect you'll set a good recipe and leave it, the paddle is a feature you'll pay for but rarely use, and the base M58 Sunto (or another pre-infusion dual-boiler) is the smarter spend. Be honest about which barista you are before you choose.
The Recommendation
For the barista who wants flow control in the most compact, polished, quietly refined package, and doesn't mind paying for that finish, Clive Coffee recommends the LUCCA M58 Sunto with Flow Control at $3,295. For the hands-on experimenter who wants the most flexible profiling platform, electronic low-flow mode, four power modes, a modular reservoir, at a slightly lower price, Clive Coffee recommends the Lelit Bianca V3 at $2,999.95. And if you decide flow control isn't for you, the LUCCA M58 Sunto at $2,995 offers the same compact dual-boiler design with programmable pre-infusion for less. Whichever you choose, Clive Coffee's team will help you dial it in over the phone. On the Bianca, especially, they teach profiling, so they can talk you through shaping your first shots.