Colorforms took the transfers from a previously released Peanuts set and added a disco ball-illuminated dance floor, whereas the Star Snoopy set came with all new transfers. The dance floor is pretty cool, though. Snoopy as the World Famous Disco Dancer was introduced in the Peanuts strip in October 1978.
2 Warps to Neptune 
Holy crap, I had one of those! Colorforms are one of those things I really wish we still had in the modern age. 😀