Perhaps this discussion has been had before, but these quotes in the "Red Sox Youth" thread made me wonder who was the best?
According to the Globe, he "runs circles around" Mookie at a similar stage of their careers.
Red Sox prospect Ceddanne Rafaela, who could be better than Mookie Betts, wraps a superhero season (bostonglobe.com)
I wish they’d done a comparison w/ JBJ. Mookie was great, but Bradley was other worldly.
I've offered up 6 well-known names (although I'm not sure how many of us can say we saw Reggie Smith play, let alone Dom D!Freddie Lynn was a JBJ defense equivalent in CF and miles ahead of him in hitting/ offensive production.