Some of the alternate costumes use different animations, like Inkling for example or, more recently, Byleth. Inkling's idle animation is different depending on if it's a female or male Inkling for example. Wouldn't that mean that their hurtboxes behave differently in their idle animation? Is there an actual theoretical/practical gameplay difference (however minor) between alternate costumes?
Because some people seem to have trouble seeing very obvious differences in animations, here's an example grabbed from Sakurai's Direct:
Notice how they hold their swords over their right shoulder. Let's say you had a Fox fire his Blaster from the left at the same height as their heads. If hurtboxes and hitboxes follow the animations (which is what I thought would be the case), wouldn't that mean that Fox would hit female Byleth in the head, while male Byleth's right hand would be hit?