Well you can now if you have the PC version(along with boss Oni, Gouken, and Akuma).
He’s pretty much the same across the board as far as I can tell. Damage was the same for everything. I also tried to combo into cr. MK/HK, but neither worked. So I think it’s safe to assume that frame data is the same.
The only difference I can find is that his teleport is much faster and he can cancel it into anything as we all know about already. Would this Evil Ryu and the other bosses be OP? Ok, they might be, but at least we can find out for ourselves instead of just dreaming about it.