I think Efren will still be a force. He's not playing in as many tournaments and he may not be as worn out from over play. His knowledge of the game and shot selections shouldn't have changed. If his speed control is still good, then I think he'd be more of the favorite. He's obviously the better kicker of the two, and more creative shot maker in my opinion. Also, his mental toughness is better than Earl's. Earl has more tendency to implode. I don't ever recall Efren's wheels coming off the cart. If the crowd is pro-Efren or anti-Earl, then that might also come into play. Yeah he's getting up there in terms of age, but would you play him even-up? One more thing to think about is that he just came off the loss from the Mosconi. Earl can't be feeling fired up from that one.
All in all, I'd think Efren 2 out of 3. Not sure which but I'd bet on 9b and 10b. and give Earl the 8b. No offense to Earl or his fans. As a shooter, he's one of the toughest out there, and I'm glad their having this match-up. Its good for pool.