No, just that when
I test drove a 99 GT I didn't notice any real difference. However if I was at the track the 99 GT probably would have run a better time. The one thing that I did notice is that my 5.0 had more down low torque, (which I like)
When I drove a 99 GT I was definately not "Wow this car is way faster then mine", but with 260HP to 225 HP, and roughly equal weights, technically the 99 GT should be faster.