I think you have to go Mayweather vs Corrales. First off, B hop was then a bigger man than Tito and for me, I wasn't shocked at the outcome. As a matter of fact I won money on that fight because I knew B hops size would neutralize whatever Tito would bring to the table.
On the other hand, Mayweather was fighting a WARRIOR and disposed of him like nothing. It wasn't even close, it was a landslide. For a guy in Corrales that knocked out guys like Robert Garcia, had wars with Castillo, it was shocking that Mayweather just destroyed him the way he did.