This matters not a single bit.
With the customization engine in these games ALL alt attires are separate characters. Every. Single. One. Even the ones you make. A single tic in a box makes them a skin for a character so that Universe ranking isn't wrecked but they still carry all the data for custom move sets and the possibility to be ranked as their own characters.
The only difference between 11 DB characters and 11 attires is you have to press down on the character select screen instead of left to get to them.
If you want showcase modes then you're getting multiple attires built in from the start.
The real bitch should be retro characters just being a modern model in old gear. That is very clearly morden day Cena in Yellow pants.