If we’re going off of Discord, Nightfall has less players but a little more of an alliance favored ratio compared to Mutanus. It will likely be another alliance magnet server, which is fine if you’re into that sort of thing.
Based off of Discord role selection this is the ratio:
Nightfall:
Players: 1116
Alliance: 58.6%
Horde: 41.3%
Mutanus:
Players: 1424
Alliance: 54.8%
Horde: 45.1%