997 TT had ecu and exhaust.
M6 has full Kelleners tuning package + supersprint headers and rpi scoops.

Enjoy

YouTube - BMW M6 vs 997TT

 

A Fair race, the M6 has camshafts ?

 

Good race!

 

Looks like GM pass by M6??? Turbo doesn't fall flat on its face like that, especially not up.

 

Yes it does. 296 deg

 

This turbo is a tip. it does fall on it face when it shifts into fourth and rpms drop to 4900 rpm! Also the M6 is explosive at high speeds

 

True that, but you have to agree that the gearbox in the M6 isnt at all that great either....

 

Why do you say that? for racing it's a very good gearbox, it shifts in 64ms and has 7 close ratio gears that keep the v10 in its powerband at all times.

 

wow...very surprising...but then again... the m6 is a very very good car uptop...

 

No one can complain at the speed of shifts, they are very good indeed. Just for my taste I think I would have enjoyed the car more if it had "just" 6 close ratios.
Having had my M6 for around a year now, I truly hate "Auto-mode" so I keep it in manual and just like you say it keeps the V10 in the powerband almost all the time, which can be a disturbance for me sometimes as I use it often to get around town...
The only real problem with the M6 is IMO the weight of the damn thing....