I have the USR rotors, and Red Stuff pads. There is no difference in thickness between them and the GD rotors. That is just a generic product image. If you look, the image for the GD rotors isn't even a vented hat, which I'm almost certain the actual GD rotors for our cars are.
My advice is this: Between those 2 get the USRs, because they are quieter. The benefits of cross-drilling are questionable, and so minor they probably aren't worth the extra noise. Especially since we are not pro drivers who could even take advantage of difference like that.
So if you want quiet rotors get the USRs or blanks from EBC. If you don't care about noise, get whichever is cheapest.