The originals are on the left of each group.
Probably the strangest thing about these toys is the tires -- they come in red, blue, purple, orange, and maybe some other colors I haven't seen yet too.
This page has a near-complete set of the Neon Squad. Note that in addition to the numerous direct copies, there are a few original molds including a helicopter and a prop plane, and one or two altered ones (such as Big Shot with a hollowed-out gun barrel and a radar dish.)
Details showing the poor molding and paint quality of the knockoffs. The arm of the Barricade knockoff (the bright green one) is a shivelled mass of plastic threads.
Back to Rob's Pile of Transformers
Top row: Tailspin, Roadhugger.
Bottom row: Roller Force, Barricade (he's on the right), Slow Poke.