Martinez is not taller than Margarito and his frame is slightly thinner. He does have a longer reach and is a southpaw. I think I've only seen Pacquiao face one or two southpaws Sanchez was one and that ended up in a draw because of a cut.

I don't see Martinez using that looping overhand left like he did to reach Paul Williams. Paul Williams had a 4 inch height advantage over Martinez and against Pacquiao Martinez have the 3 inch height advantage. That means Martinez will be punching down not up. (more power) We know Pacquiao can take a puch from a full sized welterweight. I can't see Martinez coming straight forward to try and overpower Pacquiao but then again he went after Williams. I haven't seen that many Martinez fights so I can't imagine right now what his fight plan against Pacquiao would be. Make the same mistake as De la hoya, Hatton, and Margarito did and try an walk right through Pacquiao. Ya maybe.... Martinez already stated he's too big for Pacquiao so I see him doing the same thing.