He said it is a “clean” tasting grinder and that other grinders in 1ZPresso’s range also are close to this. Making coffee taste watery is a strange claim, unless we are specifically talking about artefacts relating to non-dissolved solids (silt, particles that make it into the brew) that impact the body, texture & mouth feel of the brew.
A clean tasting coffee to me, is one that presents the coffee flavour with the minimum of artefacts that obscure the notes. Not one that makes coffee less tangible to taste.
Neither pundit explains the normalisation process they go through to ensure the closest, ‘apples to apples’ comparison. Anyone can make coffee taste ‘cleaner’, or less clean with the same grinder, just by playing with settings (I’m not saying they can make any grinder taste like any other).
I have noticed clean brews with my own Lido with Etzinger burrs, but they are not less flavoursome.