Cruisin World has more personality and humorous game play than California Speed.
California Speed is kind of just goin around and around the track, whereas in Cruisin World, you can select a country to start in.
And if you select the whole world you are supposed to get a surprise like in Cruisin USA where you can cruise all the way to the White House and see Bill Clinton in a hot tub with some bikini babes. LOL