Make that
no-one but Stoner could ride either chassis since 2007.
Not too sure about race proven either, lots of unexplained front end loses by 2010, even with Stoner - 5 crashes during races that season, all front end loses. In 2009 he had no race crashes (apart from the Valencia cold tyres on the warm-uplap). In 2008 he had 3 - Laguna, Brno & Misano, certainly the first was possibly due to red mist
the others were possibly the first signs of front end issues even before the control Bridgestone??
BTW, what do you mean by "kardan & telelever"? I tried google, but no help there. Also, why would "more comfortable ride and cheaper maintenance" be of interest in MotoGP