Personally, I don't think you can go wrong either way. Part of it comes down to color. Therefore, it is a bigger debate if you want a black interior, since that can be had in the standard Suede/Nappa interior OR the signature leather interior. I have the saddle color leather in my current '15 Summit, and love it. However, the Sepia Suede/Nappa color was just a bit too "orange" for my liking so that ruled that option out. Once I decided I wanted something different other than the usual black, that meant I had to go for the full leather in Ruby Red. The premium leather interior is nice, since it has leather on a bunch of the areas that are otherwise covered in cheaper plastic on all other Grand Cherokees. However, I don't personally know if I would have spent $5k for the option if I could have had the red color in the standard Suede/Nappa. Also, I do think that the white embroidered "TRACKHAWK" logo on the seats looks better and more distinctive in the base Suede/Nappa interior vs. the embossed, less noticeable logo in the seats of the signature leather interior. Either way, the "supercharged" logo on the doorsills should have been illuminated as the "summit" logo is on my current Jeep.