Because we're in the DVC section, let's compare the perks of staying on-property in DVC (Deluxe) between DLR and WDW. Some of these perks may also apply to those staying in Values & Moderates.
ETPE - At all 4 WDW parks, but a subset of rides at MK, EPCOT, and DAK
ETPE - Alternating days between DL and DCA, and a subset of rides at each. Perk going away!
EEH - At WDW, usually twice a week for those staying at Deluxe
EEH - At DLR, parks are open late for everybody
ADRs - At WDW, can book 60 days in advance and up to +10 days based on stay length
ADRs - At DLR, can book 60 days in advance
LLMP - At WDW, can make 3 selections 7 days in advance + stay length
LLMP - At DLR, can make selections after entering park; advantage to those who entered during ETPE, but that advantage is going away
The replacement perk of getting 1 selection of a single LLMP ride really isn't that meaningful for those who buy LLMP.
Did I forget anything? What are the remaining perks of staying onsite in DLR?