Here are my suggestions:
Do not miss: Indiana Jones and the Temple of the Forbidden Eye, Mickey and the Magical Map, Radiator Springs Racers, Guardians of the Galaxy Mission Breakout, Frozen Live at the Hyperion, and Pirates of the Caribbean if it is done with refurb as it is much better than MK version.
Definitely check out: Haunted Mansion, which has some differences including the very cool Hatbox Ghost, Mister Toad's Wild Ride and other Fantasyland dark rides that are no longer at WDW, Matterhorn Bobsleds, Space Mountain, which is also very different than the Florida version, Incredicoaster if it is open by then.
Attractions that are very similar to their WDW counterparts: Peter Pan's Flight (slightly shorter, rearranged scenes), Jungle Cruise (shorter, no temple), It's a Small World (outdoor loading and Disney characters interspersed with he dolls), Splash Mountain (single file seating and different scenes), Big Thunder Mountain (projection mapping in the final cave is a nice upgrade), Pirates of the Caribbean (two drops, more scenes, overall longer and better), Haunted Mansion (slightly shorter, rearranged scenes, Hatbox Ghost).
Attractions that are exactly the same: Star Tours, Toy Story Mania, Soarin' Around the World, It's Tough to be a Bug, Under the Sea.
Eat at: Pacific Wharf Bakery where they make the sourdough bread, Cafe Orleans, Corn Dog from Little Red Wagon (DL) or Corndog Castle (CA).
I hope that helps a bit. You should definitely read
@HydroGuy's tips for WDW vets visiting DLR. That can be found here:
https://www.disboards.com/threads/an-introduction-to-wdw-for-dlr-vets.1332683/#post-16541636 This is the most helpful thing on the boards for someone in your situation/
Have a great time!