I haven't tried the Ford GT but I bet its fast (I saw one a car show, it's even sicker in real life) but I won the guy's (I forgot his name) Viper when I beat him. When I took it into the shop I noticed that it had unique performance upgrades, making it the best it could be. This was true of most of the cars a got from racing the blacklist racers starting around #6.
Which is worse? Being hole-punched to death or being eaten alive by the cast of "Friends"?