I like FFF's summary. Only thing I would add is field length.
The place the twin bites harder than the single is from about 60 knots on the t/o roll to the point at which you're climbing comfortably away well above blue line speed. Between those two points, you have some tough choices to make if you suspect an engine problem (note not "have an engine failure") in a twin. A long runway makes it easy -- close the throttles and land straight ahead if you're airborne. On a short runway, doing so becomes a hull write off.
So even if the twin's performance is well within the field declared distances, you may prefer a single where the decision making is easier.
J Mac McClellan of
Flying went through a Bonanza to Baron upgrade many years ago. Why not email him for advice?