You can (and should) check it out yourself, simply go to Delta Net, pull up the Feb. bid awards, "wide reports", scroll down to see what trips the bottom F/O's are flying, and which trips are left over in open time.

Or you can go directly to iCrew, "Open Time" and see what's in open time, that's the bottom stuff nobody wants....which is what the junior F/O's will be flying until they get senior enough to avoid it.

But if the question is, which airplane would you rather fly....well...there is no better flying/landing/stopping/going airplane than the 757-200. The 767 is fun too, but more like driving a Cadillac, vs. the Porsche that the 757 is when light. The 737 on the other hand...kind of like driving a Yugo.