Which to buy · Every setting
Fellow Opus vs Rocket Faustino
Conical against flat — the Opus's scale curves where the other runs straight. The Opus is numbered 1–11; the Faustino is numbered 0–18.
Which to buy
Choose the
Opus if you…
- brew filter and cold brew too — Fellow rates it from espresso to cold brew
- want fixed steps you can return to exactly — 41 on the dial, plus a micro-adjust ring
- want a lighter grinder — 2.3 kg
Choose the
Faustino if you…
- pull espresso — Rocket builds the Faustino as a home espresso grinder
- want three programmable doses on a touch interface
- want a 320 g hopper and stepless adjustment
Shop links are affiliate links: BrewMark earns a commission if you buy through one, at no extra cost to you. The verdicts were written without regard to it.
Fellow now sells the Opus 2 in place of the original; the settings on this page are for the original.
Sources: Fellow — Opus (archived) · Rocket Espresso — Faustino · Rocket Espresso — Faustino brochure (PDF)
| Opus | Faustino | |
|---|---|---|
| Brand | Fellow | Rocket |
| Scale | Numbered dial | Numbered dial |
| Dial range | 1 – 11 | 0 – 18 |
| Burrs | Conical | Flat |
| Espresso → filter | 5.7 numbers | 8 numbers |
| Filter → coarse | 3.9 numbers | 6 numbers |
The same number means different things
Both grinders use a numbered dial, which makes it tempting to copy a number straight across. Setting 6 sits at grind index 34.2 on the Opus but 20 on the Faustino — far enough apart to change the cup.
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| Opus | Faustino |
|---|---|
| 1.2 | 2 |
| 2 | 5.3 |
| 3.2 | 7 |
| 5.3 | 8.7 |
| 7.1 | 10.2 |
| 8 | 11 |
| 8.2 | 11.8 |
| 8.3 | 12.7 |
| 9.1 | 13.5 |
| 9.3 | 14.3 |
| 10.2 | 15.2 |
| 11 | 16 |
| Faustino | Opus |
|---|---|
| 2 | 1.2 |
| 3.7 | 1.2 |
| 5.3 | 2 |
| 7 | 3.2 |
| 8.7 | 5.3 |
| 10.2 | 7.1 |
| 11 | 8 |
| 11.8 | 8.2 |
| 12.7 | 8.3 |
| 13.5 | 9.1 |
| 14.3 | 9.3 |
| 15.2 | 10.2 |
| 16 | 11 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | Opus | Faustino |
|---|---|---|
| Espresso | 1.2 | 3 |
| Moka pot | 1.3 | 5 |
| AeroPress (short steep) | 3.2 | 7 |
| Pour over — V60 / cone | 6.3 | 9.6 |
| Siphon | 7.2 | 10.2 |
| Pour over — flat bottom | 7.3 | 10.5 |
| Steep and release — Clever / Switch | 8 | 10.8 |
| Drip / batch brew | 8 | 11 |
| Cupping | 8 | 11.2 |
| Chemex | 8.2 | 11.8 |
| French press | 9 | 13.2 |
| Cold brew | 10 | 14.8 |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
Fellow Opus
Rocket Faustino
Dialing in the Opus
Marketed as all-purpose, and it genuinely does cover more range than the Ode, but the espresso end is workable rather than good — expect to chase it. Where it earns its place is the coarse end: cold brew and French press come out notably even. If you bought the Opus mainly for espresso, dial it as a brew grinder first and judge it there.
Dialing in the Faustino
Rocket's grinder, built to sit alongside their espresso machines and tuned accordingly. Stepless, espresso-first, and best judged on how finely it lets you creep toward a target shot time rather than on its coarse range.