I agree with DaveReidUK...there's no meaningful comparison.
However, as an unscientific observation, in many decades of continuous use of aircraft, starting with being ferried around by the RAF in FW and the RN in RW, then working for airlines and/or airports ever since and using civil aircraft a lot as a result, and all the while flying myself in FW including gliders, I have been in four genuinely life-threatening situations.
Two were due to my own stupidity when flying myself, and two were in helicopters.
I have remained alive by being more careful than I used to be, and most importantly, by avoiding helicopters as much as possible.
Last edited by Capot; 1st Jul 2012 at 15:27.