First P90 is purple only, can't get upgraded or side graded and carries 30 bullets.

Second P90 is purple and gold, can get upgraded, side graded to rapid fire SMG and carries 40 bullets.

I'm not talking about the 2 different P90s in creative, these are in the actual game right now and get dropped by different NPCs / looted from chests. The good one drops at the Meowscles POI, not sure about the bad one, I looted it from another player.