The catch
MiiCoffee DC63 Single Dose Coffee Grinder
At a fixed 400 rpm, it needs more time to finish a dose than the DF64 II or DF83 do.
Side by side
With the DC63 you get a removable chute and forty-gram single-dose capacity, whereas Opus 2 adds a one-hundred-gram load bin and supplied catches for espresso and filter.
Before you buy
Opus 2 takes that dose in one load. DC63 has a published capacity of forty grams, so the beans have to be divided.
Where this comes from
60 g is over 40 g but under Opus 2’s 100 g load rating.
The catch
At a fixed 400 rpm, it needs more time to finish a dose than the DF64 II or DF83 do.
The catch
You get no screen, no dose timer and no grind-by-weight control.


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A removable chute and forty-gram single-dose capacity come with the DC63. Opus 2 brings a one-hundred-gram load bin and supplied catches for espresso and filter.
Conical single dosing in a metal body, or bigger brew loads for a family
Which one fits
One load is enough for Opus.
That access comes with DC63.
DC63 is specified as built from aluminum.
Both formats come from Fellow.
In practice
Opus 2 takes that dose in one load. DC63 has a published capacity of forty grams, so the beans have to be divided.
60 g is over 40 g but under Opus 2’s 100 g load rating.
This helps when you plan a brew batch. It is not meant as a place to leave beans between sessions the way a storage hopper is.
100 / 40 = 2.5, the ratio of the published load capacities.
Its sixty-three-millimeter conicals and Fellow’s forty-eight-millimeter set are spec-sheet figures. They do not replace matched taste evidence.
63 - 48 = 15 mm is the diameter difference, and no matched extraction or tasting test was used.

MiiCoffee, DC63
This low-speed conical single doser has stepless control and automatic shutoff. A removable magnetic chute gives you direct access when cleaning.

Fellow, 1222MB-NA
This compact second-generation all-rounder offers stepless control and an ionizer. Two magnetic cups come sized for filter and espresso routines.
Spec by spec
| Spec | MiiCoffee DC63 Single Dose Coffee Grinder | Fellow Opus 2 Conical Burr Grinder | In practice |
|---|---|---|---|
| Load capacity | 40 g with bellows | 100 g | Larger batches fit in one load with Fellow. |
| Burrs | 63 mm coated conical | 48 mm stainless conical | The burrs differ in size and build. |
| Body | Aluminum alloy | Mixed engineering plastics | Body materials are not the same. |
| Chute maintenance | Magnetic detachable chute | Tool-free burr access | Access points are not the same. |
Trade-offs
Change of plan
Go with Fellow Opus 2 Conical Burr Grinder. One load is enough for Opus.
Go with MiiCoffee DC63 Single Dose Coffee Grinder. That access comes with DC63.
Go with MiiCoffee DC63 Single Dose Coffee Grinder. DC63 is specified as built from aluminum.
Go with Fellow Opus 2 Conical Burr Grinder. Both formats come from Fellow.
Decision guide
The DC63 has a removable chute and forty-gram single-dose capacity. The Opus 2 has a one-hundred-gram load bin and supplied catches for both espresso and filter.
With its bellows, the DC63 holds forty grams. The load bin and standard catch of the Opus 2 each hold one hundred grams. On a larger drip batch, the Fellow can spare you from splitting the beans into multiple loads.
Neither has an edge on those features. The choice turns more on grounds handling, construction and dose size than on access to stepless adjustment.
The Opus 2 comes with a thirty-gram espresso catch that works with 54- and 58-millimeter portafilters, plus the larger standard catch. A metal dosing cup and stand come with the DC63, along with a detachable chute for cleaning.
By the numbers
What we found across the premium coffee grinders we compare, plus the checked facts behind each finding.
None of the 39 models checked meets all of “A routine of measured single doses”, “Grinding enough for bigger brew batches”, and “Espresso and filter from one grinder”, so the pick goes to the closest practical compromise.
0 models fit, out of 39 checkedMiiCoffee DC63 Single Dose Coffee Grinder lists 63 mm for listed burr diameter, 31% more than the 48 mm on Fellow Opus 2 Conical Burr Grinder.
How we countedThe count uses each product's current fit ratings for “A routine of measured single doses”, “Grinding enough for bigger brew batches”, and “Espresso and filter from one grinder”. A need with no documented match is not counted.
How we calculatedA grinder counts here only if it publishes its burr diameter as a number. Diameter matters no more than burr geometry and alignment do. For context, 28 of 39 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| MiiCoffee DC63 Single Dose Coffee Grinder |
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| Fellow Opus 2 Conical Burr Grinder |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

The detachable magnetic chute is what you want
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Your filter batches run larger
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