2006 GTO or 2007 Mustang?
go gto!! the gto stock would blow the doors off the stang, plus like you said theres not that many of them, and mustangs all look the same. the gto's have quite a few aftermarket parts, as far as perf. but theyre already quick, and they have kits for the gto's but theyre real expensive and hard to find, but id say go with the gto because theyre few and far between, where as mustangs are far from few between lol