Grinding
Conical vs Flat Burrs for Espresso: What’s the Difference?
Both burr shapes are common on the espresso grinders reviewed on this site, and both can produce excellent espresso — the differences are more about character and workflow than a clear winner.
Conical burrs
Conical burrs (like the Baratza Encore ESP's) are generally quieter and run at lower speeds, and are commonly used in more affordable and mid-range grinders. Their geometry tends to produce a slightly wider particle-size distribution than a comparable flat-burr grinder at the same price point.
Flat burrs
Flat burrs (like the Eureka Mignon Specialita's) are often associated with faster grinding at a given burr size and are common on higher-end prosumer grinders, though they can run louder due to higher typical rotational speeds.
Does it change the taste?
Experienced tasters sometimes describe subtle flavor character differences between the two — flat burrs are sometimes described as producing a slightly more "defined" or clean cup, conical burrs a slightly "rounder" one — but burr shape is a much smaller factor in shot quality than grind consistency, freshness, and dose accuracy. Do not let burr shape alone decide a purchase.
What actually should decide your purchase instead
Between two grinders with similar burr quality, the more useful comparison points are adjustment range (stepped vs stepless), noise level if you grind early in the morning, and hopper or single-dose workflow — not burr geometry. Burr shape is a legitimate tie-breaker between two otherwise-similar options, not a primary decision factor.