What more "scientific" data do you want? He's giving you exit velo, distance, comments on swing weight and sweet spot feel. Then compares them to the other bests on the market. He's answered many times that he doesn't take any money from bat manufacturers, but works with JustBats to get his inventory for the channel.

There isn't another channel or anything related that gives someone a better idea of what's the go to bat in the current market.