No single grip is best on every bar and in every session, which is why these come in pairs. Find the profile closest to how you actually train, then take the pairing that goes with it.
The Beginner
Daily gymnastic volume
15+ reps
Technique level
2/10
New to functional fitness and working on technical aspects of gymnastic skills & raw strength
Seal grips offer great "artificial" grip to aid building bigger sets on strict gymnastic movements. BumbleBee completes the pairing with a better natural feel of the bar and training with chalk type grips
The Rookie
Daily gymnastic volume
25+ reps
Technique level
5/10
Getting better at gymnastic skills every week. Volume slowly rising
Training at this level requires a larger selection that covers all possible eventualities both in training and in competition. Having a choice means having an advantage.