Hi, I'll chime in on the ride thing as I am endlessly fascinated with the similarities and differences. We'll just go around the parks:
Disneyland:
Tiki Room - This is a longer show that still has the fountain. Grab a Dole Whip and enjoy!
Jungle Cruise - DL version is slightly shorter with no temple (they removed the original temple tunnel for Indiana Jones), but basically the same thing.
Indiana Jones - This is basically the same ride system as DINOSAUR at AK, but with more to look at. It is a must do!
Pirates of the Caribbean - DL has a much longer, more fleshed out, and better version of the ride. Don't skip it thinking it's the same!
Haunted Mansion - The DL version is a little shorter with some differing scenes. The recent addition Hatbox Ghost though makes it worthwhile as he is so totally cool!
Splash Mountain - The DL version is a littel different and not as good in my opinion. The logs are single-file.
Winnie the Pooh - Basically the same thing though the ride vehicle is a beehive.
Big Thunder Mountain - This is basically the same, however some new projection effects in the last cavern are cool to see.
Peter Pan - It's a bit shorter at DL with some things in a different order. The MK version is better for the most part.
Other Fantasyland Dark Rides - Since they're all gone at MK, definitely check them out. Mr. Toad is a must, and Alice in Wonderland is very cool and never had an MK analogue.
It's a Small World - The exterior is incredible at DL, but the ride is basically the same. There are Disney characters interspersed in the scenes.
Mickey and the Magical Map - Watch this show! That is all.
Matterhorn - This ride is actually quite similar to the Space Mountain in WDW, but you can see most of the time and it feels a bit slower. It's still a cool ride.
Autopia - A longer, better version of the Tomorrowland Speeedway
Buzz Lightyear - It's basically the same except you can hold your gun so aiming is easier.
Space Mountain - It's a totally different ride at DL. Don't miss it.
Star Tours - This is identical, but the line is slower because it only has 4 simulators.
California Adventure
Soarin' - This is identical to the WDW version, but still great of course.
Grizzly River Run - A longer, better version of Kali River Rapids.
Under the Sea - The MK one is an exact clone of this ride
Radiator Springs Racers - This is AMAZING! I's basically Test Track, but much longer and better.
Guardians of the Galaxy - As you probably know this was the Tower of Terror. The DL version was always a little different than the WDW version (and not as good in my opinion). I haven't experienced teh new theme yet, but will in a couple of days!
I think that covers the big ones. I am probably forgetting some, but I will add them if I think of it.