Cousins. Griffin is very good, but Cousins is better. There's a pretty big gap between being a 27/12/3 plus defender with 2 years of control and a 21/8/5 average defender with one year. They both seem to have locker room issues. Unless we really believe Griffin is being held back in LAC land by Jordan and/or coaching staff. Once upon a time he averaged those kinds of rebounds, and once upon a time he put up 24 ppg on 17 shots. If he could return to form, it would be a lot closer.
Regardless the contract is a big deal. You better be ready to spend $150M+ on him this summer if you trade a lot for Griffin.