Originally Posted by simplechamp

You could say that about a ton of different 1/10 motors, including accepted names like Novak and Trinity. They are a spec'd to fit the rules, they can only do so much to change things. Any differences are generally subtle, like the Viper has different endbell design and different solder tabs, and that's without seeing the backplate or sensor package to see if there are any differences there.

When I look at these two pics I don't see how a Viper 1/10 is trying to copy a Tekin 1/10 motor