Though this now has me thinking, which actual central cities– no, not New Brunswick, though it's a fine little town– are smaller than some of their suburbs? And NJ might still be a home to that, if you consider Trenton to still be its own core (it has its own MSA, but is part of the NYC combined area): Hamilton, to its immediate east, is larger. Similarly, Egg Harbor is larger than Atlantic City, but that is part of the Philly CSA.
The best example has to be in the Hampton Roads area: Norfolk is the central city there, but thoroughly suburban Virginia Beach is the largest.
Cherry Hill is very close to being bigger than Camden, for what it's worth. Camden WAS certainly the central city of the area before the Ben Franklin Bridge was built. I know that was the 1920s, but whatever. It's a interesting statistic nonetheless.