InfamousTuba I’m all for data too and that, plus reviews by people I trust (Hendricks Hoffman and experienced forum members) are my best shot at ending up with a grinder I’m happy with.
BUT … (yes, a big ‘but’), the final arbiter is to have the grinder on my bench sitting next to my champion grinder and to pour two espressos back to back and to line them up side by side and sample them, one immediately after then other.
Rinse and repeat three times and I generally know which one is the keeper.
(I appreciate however that not every gains permission from the Household Expenditure Approval Committee for this sort of rather expensive practice so I count myself as one of the lucky few and I intend to continue to acquire new grinders until said committee has, God forbid, a change of Chairwoman.)