I like the word "Mimesis" because of its meaning. 

Mimesis: imitation or reproduction of the supposed words of another.

Because the word itself sounds and looks so similar to "Nemesis," you could use this word to identify your copycats.

When you do great work, mimesis is inevitable. It's true that imitation is, in fact, flattery at its finest. 

Whether you choose to hate your imitators or honor them is ultimately up to you.