Quick answer
Choose the Fellow Opus Conical Burr Grinder if you want one all-purpose conical burr grinder for everything from true espresso to cold brew at home. Choose the Cera CGE03 Portable Electric Coffee Grinder if you need a compact, battery-friendly travel grinder with 30 click settings and a 22 g dose for pour over, Aeropress, or French press on the go.
Burr design and grind range: all-purpose vs click-based control
The Fellow Opus is built around conical burrs and is described as an all-purpose grinder that covers the full range from true espresso to the coarsest cold brew. That makes it a single machine for a household that switches between espresso and filter methods. The Cera CGE03 uses 10-star stainless steel burrs with 30 click settings at 20 μm per click, giving you repeatable, numbered adjustments rather than a stepless dial. If you like to note a setting and return to it, the Cera's click system is easier to record; if you want to move freely between espresso and cold brew without counting clicks, the Opus is the more flexible choice.
Capacity and portability: countertop vs travel
The Cera CGE03 is explicitly a portable electric grinder with a maximum ground coffee capacity of 22 g. That is roughly a single large mug or a small batch for two, which suits travel, office, or camping use where you grind just before brewing. The Fellow Opus is a countertop all-purpose grinder; its catalog entry does not list a hopper capacity, so if you regularly grind large batches for a full pot, check the hopper size before buying. Portability is the Cera's clear advantage, while the Opus is designed to stay in one place.
Brewing methods each grinder is built to handle
Cera lists compatibility with espresso, drip, French press, moka pot, pour over, cold brew, and Aeropress, so it covers the common manual and filter methods in a travel format. The Opus is positioned for the full range of brewing styles, including true espresso and the coarsest cold brew. Neither grinder's catalog entry lists motor wattage or grind speed, so if you plan to grind light-roast espresso daily, test the grinder's espresso performance with your beans rather than assuming speed from the specs.
Trade-offs to weigh before you buy
- Portability vs countertop footprint: The Cera CGE03 is a portable electric grinder, so it packs for travel and small kitchens. The Fellow Opus is a countertop all-purpose grinder, so it stays put. If you brew in more than one location, the Cera's portability is the deciding factor. Decide where you grind most often before comparing grind settings.
- Click settings vs stepless-style range: The Cera's 30 clicks at 20 μm each give you a numbered reference for every setting, which is easy to log for travel recipes. The Opus covers espresso to cold brew as an all-purpose grinder, but its catalog entry does not list a click count. Choose clicks if repeatability matters; choose the Opus if you want one grinder for the widest brew range. Write down your preferred Cera click number so you can return to it after cleaning.
- Dose size vs batch size: The Cera's 22 g maximum suits a single large mug or a two-cup pour over. The Opus catalog entry does not list hopper capacity, so if you brew full pots, confirm the hopper size before ordering. For daily single servings, the Cera's capacity is not a limitation. Match the grinder's capacity to the largest batch you brew regularly.
Product facts at a glance
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Cera CGE03 Portable Electric Coffee Grinder: 10-star stainless steel burrs with 30 click settings at 20 μm per click and a maximum 22 g ground coffee capacity. The numbered clicks make travel settings repeatable, and the 22 g capacity suits one or two cups per grind.
Cera CGE03 Portable Electric Coffee Grinder
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Fellow Opus Conical Burr Grinder: Conical burr grinder described as all-purpose, covering true espresso through the coarsest cold brew. One grinder can serve an espresso machine and a French press or cold brew setup without a second unit.
Fellow Opus Conical Burr Grinder
Who should choose which
Best for
- Home baristas who want one conical burr grinder for espresso through cold brew
- Households that brew several methods and prefer a countertop setup
- Buyers who want an all-purpose grinder without counting clicks
Not for
- Travelers or campers who need a grinder that packs away
- Buyers who want numbered click settings for repeatable recipes
- Anyone grinding only single 22 g doses and wanting a compact footprint