Same bumper even. Just rebadged. The G8 had an entirely different front end from its Holden counterpart (hood, fenders, bumper cover, etc.) but the new SS is pretty much unchanged.
As for being overpriced, it's a 400+ horse rwd v8 powered sedan chock-full of gadgets. Name me 3 similarly priced competitors. The SRT cars are all I can think of. If I were in the market to replace my G8 I'd be first in line for one of these with the 6-speed and mag-ride.