Barely any color, the fug? R4 may have the single best use of color in that generation. The deliberate, pastel, dreamy visuals add so much to its visual flair. Each stage has a specific look. RR64 is just color puke, with car models that look like they belong on the very first Ridge Racer game. Look at the hideous skybox on RR64 compared to the intelligent use of a soft gradient on R4. Gawd, I can't believe I'm reading this crap. R4 is one of the prettiest games of that era, RR64 is the redheaded stepchild of the franchise.
When it comes to speed that's the first race on R4, the campaign starts out really slow and gets progressively faster. Both games are locked at 30fps.
Controls have very little to do with this thread, but any Ridge Racer fan will tell you that R4 is a superior game. You have no idea what you are talking about, especially when you complain about collisions in comparison to RR64.