Ok, I have RCT and I have Ultimate Ride...(just the original, not Coaster Deluxe)
In my opinion UR sucks in comparison...I mean, why is it that a DISNEY IMAGINEERING video game based on building rides, does NOT allow you to build a park??? it's just ROLLERCOASTERS...now...I've been to WDW and I can only think of 1 rollercoaster that is even close to those that you can build on UR...
Now, RCT allows you to run a park, build a park...BE THE PARK!
the options are endless...
DISNEY IMAGINEERING dropped the ball with it...the only good thing about it is that you can ride your coasters...but that gets really boring after a while.