...far be it for me to agree with Wright

but having done pretty much the same flying, id hafta go with the Van also. granted, my twin recip time was in 402's, and back then i thought that was the shiznit. but
then i got a van job for a year...it dosent even compare.
-easier to start (esp when hot) start switch ON, low fuel @ +12%
-easier to fly (props are always set, gear always down)
-easier to maintain (can you say 8,000 hour TBO)
granted, it can be slower (depends on max ITT). and more expensive when TBO does come around, but everything ive seen in regards to that actually works out cheaper in the long run.
yea, the debate rages on. lose on engine in a 402 on a hot day at max gross and youve got a whole lot to worry about. but im trying to recall the last time i heard of a van engine shutting down....even if it did, im guessing that Navaho has nowhere near the 11:1 glide ratio
i dont know what to say about pax "comfort level". id wager a bet that if they were parked next to each other on the ramp, and the pax were given the option...that van would see alot of work. short of that, you cant deny the perception that 2 engines is supposedly "safer".