My views on coasters and parks are quite different than most enthusiasts, so I'll just give an opinion of most enthusiasts about these parks that you'll probably agree with [:)]
Having been to both parks, I would say that CP is the better of the two. Its well kept, though the wooden coasters aren't maintained well (same with SFMM),has a nicer environment, and the coasters are more thrilling
![test [lol]](https://www.coastercrazy.com/forums/images/smilies/icon_e_ugeek.gif)
(sorry, can't help but laugh at myself saying this as my opinion isn't very positive of these parks nor coasters). But I'd say go with CP definitely.
CP is also closer to a lot more parks, like Geauga Lake, and if you can head east of it approx. 5-6 hours make sure you go to Knoebels, it has 2 incredible wooden coasters, and IMO better than the stuff at CP and is a better park overall.