single time is single time, multi time is multi time. If your aim is to go through onto airlines then the multi time will get you there quicker than the single time.
Keep in mind the progression within any particular company though, would it be better to spend some time on the caravan if you knew the C90 lay in wait? probably, and you'l really enjoy flying the 208. If on the other hand, it takes 2 years to get onto the C90 then flag it and start drivin a clapped out baron around the bush. Some real fun there too!