I have 5, and they all relate to Cedar Point.
1. MaxAir is better than Raptor. I love flat rides, and this was one that I could ride over and over. Raptor was boring.
2. GateKeeper has worse restraints than Valravn. On all 3 of my rides on GateKeeper, the vest tightened so much that I could hardly breathe. On all of my 6 rides on Valravn, the vest did not tighten at all.
3. Rougarou and Raptor are very interchangeable. Rougarou is known as a pretty boring ride, but I found that I was looking forward to that inclined loop a lot on my second ride. Raptor crawled through its layout both times I rode it, and the only redeeming factor for that is the hangtime i got exiting the cobra roll. The helix was the best part.
4. Valravn is top 5 in the park (at least until TT2 opens). Here is my current ranking of coasters in the park: 1: Millennium Force 2: Valravn 3: Gatekeeper 4: Raptor/Rougarou 5: Gemini 6: Corkscrew 7: Iron Dragon. I haven't been on SteVe, Maverick, or Magnum yet, and I think those would all be above Valravn.
5. Millennium Force provides a better view than WindSeeker. This is solely because from Millennium Force I could see Frontier Town, and that is the best looking area in the park.