That fight is winnable for Brown, but it won't be fan friendly. He will have to bust out with some Tito style lay and pray. I've met both of those guys and Brown is definately the bigger guy, his wrestling is the only clear cut advantage he has skill wise against Aldo and he will need to use it. Aldo is pretty slick on the ground (he's a legit BJJ blackbelt), but we have yet to really see it since he has so much fun destroying people on the feet.