The 46 player Homefront map is the new updated map with Rivers, etc, which you may have heard about. The 50 player Homefront map is the OG version.

To my understanding, they’re currently “phasing out” the 50 player map and replacing it with the 46 player one, although I don’t know all the details.

I haven’t seen a 50 map in a while just 46.
Been a long time since I played that one.