Comparing the top dog S650 with a base EB S550 is hardly fair, but the DH definitely looks awesome! I'd love to see a Mach 1 HP next to a DH. I still the think the S550 is the more "beautiful" car with more feminine lines/curves, where the S650 is more of a brute.
Side profile is looking good, but that rear end just looks goofy to me. Especially with the tiny dual exhaust with the big dirty diaper diffuser. I guess the dual exhausts are just a prototype thing and all production GTs have quad exhaust. At least I hope so.