this post was submitted on 17 Dec 2025
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Coffee
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I have the exact same grinders and use them exclusively for espresso. I would say that the DF64 produces brighter flavors and the J-Max a thicker body. But, as I use the J-Max as part of my travel kit with a Flair Pro 2, the difference might also be attributed to the narrower and deeper puck of the Flair compared to a traditional 58mm basket. I'd also tend to attribute the differences to blade geometry rather than size.
I've heard that larger burrs produce less heat and help retain more flavors. I don't know it there is a serious scientific study confirming it.
That sort of what I was thinking, the different grinders actually produce different flavour, profiles, rather than better or worse. That's a good point about the shape, I'm almost tempted to do it to try different burrs on the same coffee. My palate is shite, but the one of my son-in-law's is pretty good, so maybe more of a fun thing than a practical thing.