It behaves identically, and looks identical to the real one, but it comes in color schemes that TOMY's one does not come in. Robot Dog's box shows a white and blue variation of what is either a Spotbot or the knockoff, and a white and pink variation (if the pink one is a Spotbot, then it's likely a recolor, as TOMY didn't sell a pink one). No actual photos of the knockoff coming in these color schemes have been found.
The only color schemes confirmed to exist include a dark blue, translucent one with a red muzzle, patch on its left eye, ears, and back legs, a yellow tail, and dark blue feet. Another color scheme that's also dark blue and translucent has a yellow muzzle, pair of ears, back legs, and tail, and red feet and front legs. This color scheme also has a red, translucent area where its eyes are, and a yellow patch on its left eye.