After driving my BMW Z4 on the track and comparing that solution to the one on the SRT6, the MBZ solution is by far the most livable.

The BMW system is in two levels, full "mommy mode" and just "slap your hand a little". In full mode, the system literally shuts down everything when your driving gets spirited. When I tried running at CMS with it on, it would allow no momentum coming out of a hard turn. It was like driving through molasses. When I turn "off" the primary control but left the traction control on, I was able to get some momentum and actually improved my speed down the back straight by as much as 10 MPH (to 90). Turning off the second stage made the car very unstable and tail happy.

On the SRT6 going through the same corners with ESP engaged, I was given the opportunity to give it some power exiting that corner without the car bogging down. I was able to reach a speed 20 MPH (110 MPH) higher than my best time with the Z4 (1st level disengaged) and 30 MPH faster than with the Z4s with both levels engaged.

I truly believe that the MBZ system is far superior for the average driver. Maybe a full out racer could do better with the BMW system. Bottom line, the MBZ system is far more forgiving (and fun), especially for the novice.