Capt Wally mon vieux,
In FAR23 terms I'll stand by what I said, on balance I'd rather be in a PC12 than any of the other types in any condition of flight, because n one of them including the King Air are required or certified to show anything other than a OEI positive rate (>+50fpm) after TO and the ability to maintain level flight (+/- 50fpm) in ISA at 5,000ft.
Any other gradeints including the ones you mention are required by operational regulation (charter or public) flights not by design.
Ergo an airframe and seating system that is designed to be crash tolerant because it is a single, is in this context safer. And moreover, completely removes the temptation from the pilot to chance his arm. He must concentrate on doing what he should be, i.e. flying the aircraft safely all the way into the crash site until all the noise stops instead of trying to keep the twin aircraft upright. The end result for both is all likely events going to be the same, the PC12 is way in front in survivablility. VFR and IFR.