Said it before, will say it again: I don't think there's one definitive, totally perfect version of the mansion.
DL Pros:
-Pre-ride portion is better
-Hatbox Ghost
-Less of a cluster before load
-Classic hitchhiking ghosts
DL Cons:
-The load area and the random rise to nothing before you enter the endless hallway. It's ok when they forget to turn the lights on in that part of the load room and you can't see the wall right next to you on your left and a giant featureless unthemed empty space on your right.
-Maybe just me but I've had WAY more issues with audio in the doom buggies in DL.
-Post-Florida, ride feels much shorter
-HMH means the real ride is missing 1/4 of the year
-soapbox having to hear about DL's being better because of something tied to Walt (other than decreeing the look of the exterior, he really had nothing to do with the final product) OR because "you enter through the front porch," something that in the grand scheme of things doesn't really matter and shouldn't be used to totally discredit the other mansions the way it sometimes is. off soapbox
MK Pros:
-New scenes (immediately after load) help add to the immersion of the ride and help pad it out a bit
-Through the music in the piano scene, it adds a touch of melancholy that I love and miss in CA.
-Cool stairway addition
-Better lighting
-Doesn't have HMH, so the MK version is maintained better. Half the time you wonder if the person in charge of taking down HMH every year in CA really cares about getting everything 100% back to how it's supposed to be.
-Better attic scene (if it MUST be there...)
MK Cons:
-Loading area is always a cluster (really could be extended to everything prior to boarding your vehicle)
-New Hitchhiking ghost effect is dated and weak
-No Hatbox ghost (although I expect this to be temporary)
I honestly don't care about the MK queue. It's not perfect but, again, there's more to look at than DL's (which is fine but hardly exceptional) and soapbox again I really don't care for the way it is used, again, to totally discredit WDW's mansion and declare DL's obviously better as a result.off again
Personally I come on the side of WDW's overall, but both have their strong points. Looking forward to experiencing Tokyo's for the first time and being able to compare all three soon enough!