Niche Zero vs. DF64 Gen 2 — I did a blind shot comparison with a trained SCA judge

Setup: I paired with a friend who holds an SCA Q-Grader certification (she goes by JudgeSoph locally — she doesn't want her full name on the forum). We ran 10 shots each from the Niche Zero and DF64 Gen 2 completely blind. Same beans: Onyx Coffee Lab Ethiopia Harrar, medium-light, 12 days off roast. Same dose 18g in, 36g out. Both grinders dialled separately to achieve matched flow rates before the test began.

Results: Judge preferred Niche Zero on 7/10 shots for "sweetness and clarity." DF64 Gen 2 won on "body and texture" on 6/10 shots. Neither grinder dominated overall — both are genuinely excellent. Key quantitative finding: DF64 retention averaged 1.4g vs. 0.3g on the Niche. For single-dosing workflows this is a significant practical difference. Shot time variance: Niche ±1.4s, DF64 ±2.1s — slightly more consistency from the Niche.

I was not expecting them to be this close in cup quality. The retention and workflow story is where they separate.

I own both and this matches my experience exactly. The retention on the DF64 drove me to add RDT and a dosing cup before I made peace with it. Flavour-wise I'd describe the difference as Niche = transparent and sweet, DF64 = rich and dense. What burrs were in the DF64 — stock or aftermarket?

Aftermarket Italmill 64mm burrs — I'd consider the DF64 with these a different machine entirely from the stock version. The stock burrs showed noticeably more astringency in my earlier testing. If the comparison is DF64 stock vs. Niche, the gap would be wider in Niche's favour.

The physics explanation for the "transparency vs. body" difference: flat burrs (DF64) produce a higher proportion of fines, which increases body and syrupiness. Single-dose conical burrs (Niche) produce a more bimodal particle distribution that increases clarity and sweetness definition. Neither is objectively better — it depends entirely on what you value. For straight espresso with a light roast, the Niche's clarity wins. For milk drinks or a denser, more traditional espresso character, the DF64 flat burrs deliver that naturally.

The retention data is the real deciding factor for most home users. 1.4g daily waste from the DF64 is ~500g/year of coffee if you pull one shot a day. Over the price difference between the machines, the Niche zero-retention story has a genuine economic argument.

Important note: the DF64 with Italmill burrs is ~£350 total. The Niche is ~£550. The DF64 is still a better value proposition even if it's marginally behind on cup quality in this test. For someone on a budget the DF64+Italmill combo is arguably the best value in single-dose espresso grinding right now.