Yes, they are definitely a different shape. These shades were an included option on my Ascent. I noticed the difference when I tried installing. I went back to the dealer to check on this. They checked a new pair in the parts department, and found the same difference. They couldn't explain why. I did finally install them, but it was challenging. It is definitely strange that the rear side windows would not be the same shape! Just looking at the design/dimensions of the car in the rear, I couldn't see a reason why they should be different? Wonder if this is a manufacturing defect/oversight?