Emma's outfit appears mostly to seduce- Wonder Woman's, to me, appears to be mostly a combat costume.

Then again, not familiar with Marvel- does Emma actually do anything physical in that?

Diana's very physical, in fact, I don't think I could come up with a better outfit for her then her normal outfit. A lot would depend on how invulnerable WW is, but I think she's at least as tough as Donna Troy- so killer bees shouldn't be a big problem.

One thing I will say, a lot of the newer female superheroes I've seen are wearing pants or long dresses.