why? with normal human stats WP is faster, has superior reflexes, and according to Wiki can fly (I don't remember that in the most recent X-Force though, I could by wrong). Standard gear, WP has blades he can throw with high accuracy and is at least as well trained in combat as Rogue is.
Can Rogue win? Sure. A majority? no, it shouldn't even be close.
If Rogue started with any of her previous powersets, sure, it is a totally different fight, but Proudstar should have no problem dealing with what is otherwise a normal human before she can touch him.