I tried to play Bad Cats last Sat at a pin gathering, and I barely got through one game. Granted, I couldn't hear it and had no clue what I was doing, but my mom has Flintstones and it rocks. She sent MSF to my house to make room for Flintstones then shipped it in from across the country because she liked it so much. It's lots of fun, and you can get mods to make it more Hanna-Barbara than the movie characters if you'd prefer.

I have JP and MSF beside each other, and the layouts for both are VERY similar. Flippers, pop bumpers, ramps all in the same location. However, to me, they don't play anything alike because of the modes and strategies involved. My Spiderman also has the 3rd flipper in the same spot, and all 3 machines have multiball, but not all multiballs are made the same. My mom has TAF and Flintstones beside each other, and both have the third flipper in the same spot, and neither plays like the other. I've never played Elvis, but I think you'll be fine with it and Flintstones still giving you variety.