Babe Ruth goes to 50-70 field with leads, pickoffs, and full MLB rules at age 11, some age 10's
Bigger field = longer throws. Pitching while holding runners, not balking, pickoffs, pickoff plays, 1st and 3rds. A lot more baseball.
LL remains 46-60 and no leads, pickoffs, etc. Small field, same size as a T-ball.
Babe Ruth is better for player development. I'd pick that.