I get he looks better under the hood, but in the end results matter. I pay more attention to those things nowadays too, especially when trying to predict what a guy will do in the future but sometimes it just does not matter, there are players in mlb who have below average bat speed but put up great offensive numbers.
Durbin and Eaton have well over 3,000 PA's in the minors between them and Durbin has clearly had better results.
If EAton had better bat speed and we were comparing small sample sizes I'd agree with you but we have a lot of results on the field that say otherwise.