Where 1% relative seniority is Most Senior and 100% is Most Junior. Accurate as of this last bid; a pilot who was 50% overall in the company would be:

ATL 61.5% (in other words a 12% penalty if you want ATL)
NYC 40% (or a 10% bonus if you can get to NYC)
DTW 52.3%
MSP 48%
SLC 40.5%
LAX 54.5%
SEA 45%

There are many ways to look at the data and this includes widebodies that probably aren't realistically on any new hire's radar. The Narrow-body fleets, particularly the 320, have brutal schedules. Resultingly the 330, 767-400 and A350 right seats go senior (in many cases) to the 717, 220, 320, 737 left seats.

Also, there are still some odd wrinkles. In MSP the 320 is considerably more senior than the 737 even though the 737 seems to have better trips and pays a tiny fraction more. The 320 is an all-around better airplane, but not good enough to explain the seniority inversion.