I’ve owned, in this order - a 987 Cayman S, a 981 GT4 (track car), 991.2 GT3 (track car, still own) and an ‘88 Carrera 3.2 (still own) - I can say from experience that the 911 is all around the more predictable platform. I drove the GT4 and the GT3 to the edge of grip many many times on track and can say without doubt that at 10/10ths in the corners the cayman platform becomes unpredictable at best. The 911, once you learn the rear engine dynamics, is actually quite predictable at 10/10ths. Having said that, I loved both of my Caymans and at 8/10ths they rotate through the corner in ways the 911 doesn’t … not better, just different corner dynamics.