It looks like the difference between a Mach 1 and GT performance wise is similar to that of a GSR and Type R(20 ponies in a 4), while what they actualy did to achieve the difference is more like... and HX and an LS... theres nothing really similar... It's a lot easier to make power in these bigger engines, but don't get me wrong it's an awesome car, and I would call it what it is, a Mach 1, but I wouldn't get all offended if someone said I have an LS, only it has VTEC.