Hello!
We've discussed this before several times. The main problem lies in the fact that these statistics are derived from very small numbers and therefore are almost meaningless in a purely scientific sense. We are talking about one corporate accident and two AOC accidents over a period of five years. Over the next five year period it can be other way round and the statistics will be reversed.
I have experienced both sides (or all three including owner-flown aircraft) and feel unable to give an explanation why one or the other kind of operation might be safer than the other. Especially within the totally unregulated corporate aviation there are enormous differences to be observed. There is the kind of "high end operator" who will hire 5000+ hour ex airline captains and have all their aircraft flown by two captains only, and then there are the PC12, KingAir or CJ operators who put a 300 hour newbie in the left hand seat to fly their aircraft single handedly (we have both types on our home base!). Compare that to the AOC operator who pairs a 3000 hour captain with a 500 hour co-pilot and forces approach bans and factored landing distances upon them. Any statistics can produce nothing but random numbers here.
regards
max