Then there's just the minor issue of having a common type rating (although the differences are enough to restrict you to type operationally). This not only affect pilots but engineering, cabin crew etc.
I don't see how the aircraft type would have any effect on whether they got in at PQQ? I've had plenty of other aircraft go around in front of and behind me a PQQ, and vice versa. Regardless, the PQQ services aren't Q400 (yet)!