[clar]

Most importantly, the 570S is more fun to drive based on many reviews. My experience with the 12C indicates that it was a little vague in its handling and feedback. It's awesome for a first production model, but competition is very stiff in this segment.

Originally Posted by M6-Coupe

Well, although 12C has more power but has the same torque (600 NM) and that's why at lower speeds (i.e. 0-60 mph) 570s is about 0.1 second quicker. Also 570s is abit lighter and has the latest technology (including traction control) and upgraded SSG (transmission) and looks nicer IMO.
You can compare specs here:

12C:
http://cars.mclaren.com/files/live/s...%20Spec_V6.pdf

570s:
http://cars.mclaren.com/files/live/s...cification.pdf