ktm565, I came acorss another bit of info on the Four C upgrades -One change made from 05 to 06 is a new feature with the 4C chassis and DSTC integration. (Dynamic Stability Traction Control)
Given a situation in which DSTC is on, and 4C setting is "Comfort." If DSTC detects that the vehicle is losing control, the vehicle will automatically switch from "Comfort" to "Advanced" without any driver input.
In other words, if you screw up in either Comfort or Sport, the vehicle will switch to Advanced in a further effort to help regain control.