This could be very interesting. I'm leaning with Matthysse at the minute. Any time I've seen him he has been a very impressive pressure fighter with a very good punch. Likes to mix it up as well. Seem to remember him really going to the body against Zab and taking over later on in the fight.
Soto though you just can't write off really good boxer. Think the size difference might be too much for him this time round though. Matthysse seems to have done something to the US judges so he'll probably lose again.