I'm not saying Slammiversary wasn't good because it was, but I feel the top two matches didn't deliver. Sting can't go anymore. Cena/Ryback was what thought it would be. Punk/Jericho wasn't quite the classic I thought it would be but maybe my expectations were too high after seeing their other two matches. You put the undercards against each other and those were about dead even. I'm going to give the edge to Payback for the double switch.
Slammiversary was good. For me Payback was better. It comes down to who I prefer to watch and a card that has Daniel Bryan, Ziggler, Jericho and Punk is usually going to win, add to that a Divas match that gave the Knockouts a run for their money and the double turn and Payback edges it.