I played around some today. I felt no change in throttle response, but I did feel a slightly tighter steering. That could be from the firmed up suspension but there was a slight difference.
2013 X3 35i, Vermillion Red/Sand Beige: MSport, Premium, Technology, Premium Sound, Hud, More...
2012 335is, Space Gray/Oyster-Black: DCT, 19s, Premium, Convenience, Nav, Heated Seats, More...
Gone '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i