If you mean how they view on your character, my answer you don’t see a difference on your character when you switch batches. Only weapon and clothing does.
The batch gives you br, depending on how much training you’ve did on them. And if you have the complete matching set (clothing, weapon and batch) you receive extra ATK+250/500/1000, DEF+250/500/1000 and HP+250/500/1000 (also depending on quality of the set B, A, S). =)