[SPLIT LIP]

The base suits are unique to the riders, not the lock seeds. I don't understand how there's still debate over that, that's HOW Arms Change works.

Baron will always look like Baron. Even if they gave him a new base suit, it would still look slightly different just like Zangetsu did. But they didn't have time for that.

Regardless it's still not a plothole. Kurokages notwithstanding, given they're designed to be generics, all the drivers give the riders unique looks. The Lock Seed has nothing to do with it. (Even Kachidoki and Jinba merely add to the base suit, though Jinba is just new colour to the helmet)