imo...Buzz is better at DL (than at MK) because the guns lift out (so you can be shooting targets nonstop 360 degrees around).
& i personally think Soarin' is better at DCA (than at Epcot) because of the wonderful historic Aviation theming & because it's Soarin.... over.......California.

(granted same ride.....but I always like to end our visit with a final trip on Soarin (normally with a FP).
Edited to add....the original Fantasyland rides shouldn't be missed (especially Alice, Pinocchio, Toad & Storybookland....& none of these are at MK).
Amazing & wonderful rides for kids of all ages (and all are over 50 years old i believe).