The strange thing is that Foreman used to feast on pressure fighters and really thrived most against them (Soto Karass, Tsurkan, Roman, Santos etc) but then he ran into two consecutive guys within that style that he suddenly couldn't cope with. The key differences between Cotto & Wolak and those past pressure fighters he'd faced: much more relentless aggression instead of just plodding (remember, he'd seen a green version of JSK, a pretty shot Santos, and already fairly war-torn versions of Roman and Tsurkan) a much higher workrate, and denser fists - especially in Cotto's case. It goes to show it isn't just styles that make fights. It's styles and effectiveness within styles.