Bergolla and Caba will probably go as far as nutrition and weight lifting takes them, that is, both are good contact hitters with a good batting eye. Caba might be the more talented hitter, but in both cases, they need to develop at least alley power to be credible ML hitters.
Brito is another, really small when he was signed, has developed a littlle pop and is improving as a hitter.
Caba's edge is as a plus defensive SS, anything over .700 OPS makes him a solid ML starter.