I like the new wing/spoiler more than the "racer" one on the 997. But the 997 rear bumper cap styling would be better on the 991 than what is shown. I think it really pulls the back of the car together in a classy way that would pick up the horizontal ridge over the 991 taillights.  This is the first GT3 that I am tempted by (if it can get in and out of my driveway).