G1 Counterfeit ID Guide updated with toy ID Guides.
I mentioned this in one of the "comments" sections of the site previously--there are some very good counterfeit toy ID guides on Chinese sites. They're made by a user named coolyooyu. Even though they are in Chinese, the pictures and visual cues do an excellent job showing you the differences. I've added all of them to the G1 Counterfeit ID Guide: Devastator, Scourge, Grimlock, Sludge, Slag, Wheeljack, Prowl, and Springer.