Things are in a lot of flux right now, it’s hard to have a solid answer. But in general the 320 is more senior to the 737, although I don’t know if if that difference matters a lot.

The bids often favor one type of equipment over another. One might be heavy on 737 awards, the next might be heavy on 320 awards. I was on the Bus for 8 years as a FO and jumped to the 737 for upgrade because at the time the 737 was quite a bit more Junior. But two bids later, it’s about evened out. Oh well.

With the current movement, bid the airplane and base you want. The rest will work itself out in the wash.