Hi KSDave....I have ridden both The Mummy and Everest. Intensity, thats tough b/c they are definetly different rides...lets see here, they both start off going forward, then at some point come to a stop and then go backwards. Everest seemed to have a lot more Darkness. Seeing that the car is a full length car on Everest compared to the smaller size car on Mummy, I think you get whipped around a little bit more on Everest and there is also a decent drop near the end....(just a little tiny bit more intense in my opinion!) Hope this info helps out!!