I had a blast the 3rd session at Buttonwillow Raceway Park keeping up with a BMW M3 (Sport Tuned)... Now I know the driver and I were about the same skill level as we both missed apexes from time to time.
But I have to say the straight line power, we were dead even. So SRT6 and BMW M3 (about 2002 or so) ... even heat.
Pictures and video to follow soon in it's own little thread.