RIP will guarantee all houses, scare zones, Bill and Ted's show, and possibly a ride or two. Literally skip to the front of every line using shortcuts. However, you might not be able to spend much time in the scare zones, you might not get to see the other show, and you might not get to do some rides. But, after the RIP tour ends, you should have some time left for the scare zones, rides, and possibly the other show.
For your date, it's hard to say which would be better. If the crowds were expected to be worse, I'd say definitely get the RIP. The Express Pass might be all you need though. Tough call. Be sure you do get the RIP or EP though.
The year we only had one night, we opted for the RIP, and we were very happy we did. Since we're going multiple nights this year, we're back to the EPs.
For your date, it's hard to say which would be better. If the crowds were expected to be worse, I'd say definitely get the RIP. The Express Pass might be all you need though. Tough call. Be sure you do get the RIP or EP though.
The year we only had one night, we opted for the RIP, and we were very happy we did. Since we're going multiple nights this year, we're back to the EPs.