Honestly, I am not sure. At the time of the Trinidad-Joppy fight (which I attended live) I would have gone with Trinidad. But, after seeing Felix struggle with the durability and caginess of Bernard Hopkins, I would probably go with Briscoe by decision, or, late KO.
I say Briscoe by late stoppage. Bad Bennie has faced the best middleweights of his era and in his long career he has only been knockout once against Valdez. In my opinion his steel jaw would have withstood Trinidad's left hook and the Puerto Rican champion was a rather one-dimensional fighter and he had no plan B if his weapons didn't work against his opponent (we saw it with Hopkins and Wright). Briscoe was an aggressive fighter with the power to knockout Tito in the last part of the fight after a spectacular slugfest.