Diaz landed a lot more but Smith had some power shots....they each had a takedown. I'd say Diaz just on the # of punches landed.
Body shots killed Smith again. He has a history of having a soft middle, I've seen him beat like that a few times.
I've seen him get hurt and make stunning comebacks as well. Smith has many more fights left in him, I just don't think he will ever be champion.
I gotta see a replay. Those freaking idiots had the camera on Arlovskis back and I couldn't see what hit him.