Not to mention certain resource charters have extra insurance requirements (mainly for the smaller operators) but I imagine there's some for VARA too... e.g. only certain listed pilots to operate into a field, minimum equipment requirement, max allowable extension of departure time, and so on.
Also, if you have to ask if a Fokker does better into most FIFO airports, you obviously weren't around during the mid 00s boom. Couldn't buy them for love nor money. XR were slaving to track them down.
Maybe it's changed now but I recall many a time leaving a 146 or a Dash 8 in our dust on a 40C day...