It was a very close fight but shane was out-boxed when it counted the most - the later rounds, even when cotto was hurt. And that's uncharacteristic of Shane since he usually finishes strong. So to me, that's a clear sign of shane aging and not being the same old shane.
And you stated that mosley since being with Richardson reminds you so much of the 135 pound mosley, well how can you really tell if he's only had one fight? That was against margarito, a guy who was standing in front of mosley the entire fight and a guy who could not get out of the way of shane's right hand for the life of him. It was the perfect scenario for shane - guy who's not going to be moving around and a guy with piss poor defense. That's why I think that fight is a bit of an illusion. Against a guy with footwork, speed, a guy who can punch going backwards or side to side and a guy with great defense and countering abilities, it's going to be a completely different fight.