The difference is that I don't think GSP would leave his arm out like that for Silva to lock in a triangle, or arm bar, or anything, even after a tiring five rounds. On the other hand though, Andy would take GSP on the feet and after the Chael fight I'm not sure Silva will ever allow himself to be dominated like that by another wrestler again. As another aside, I doubt they'll fight at MW, if anything I'd say they'll fight at catchweight.
Sjung f÷r gamla Djurgňr'n
Lock the gates, make them watch...