It depends on which "starter" Mustang you are talking about. The V6 is useless. The V8 they have superchargers, different fuel systems, suspensions, exterior features, the interior is different, and other little things. BUT in no way does it constitute paying $66,616 for a new Mustang SVT
Cobra. You can buy a normal GT for $25,000 put a Turbonetics turbo kit on it for $4,000, get the suspension beefed up for $1,200 and blow the doors off the SVT.