Sometimes you and your Opponent pick the same model. Well sure the paint job should keep them separate. What you haven't painted them? No not judging. but you may need "Skill Rings".
Skill rings fit around your model's bases so that you can easily differentiate between models with different skills or that are on different teams. Each pack includes 30 rings in three colors: 24x 25mm rings and 6x 50mm rings.
The skill rings even fit Super Dungeon bases, in case you want to identify—I don't know—a leveled up monster from its lesser peers, in a game mode which allowed monsters to advance....
Know as "The Pile" this is actually how skill rings reproduce in the wild.