Bid both, take the one you get first. Not trying to be flippant; *where* you want to be is much more important than what you fly IMO. I've been on the S80, the A300, 72, 73, 75, 76, and 77 during my time here. They each had their charms and problems. The main flying difference is NB or WB if only because of the legs/duration of each and your personal preference. But since you're talking about two NBs, just take the one that gets you where you want to be quickest.