I am not even realy talking about quality, but more in terms of scope, future outlook and awareness by the general public.
In terms of size, I think it has passed DLR. Future outlook, it isnt even close. They have expanded just as much if not more so thatDLR in the last 5 years, and while DLR has absolutely no development plans for the resort in the near future, USO is alrealy undergoing another massive expansion with a huge e-ticket with Transformers, another new land with the expansion of Potter into the studios park and are currently building another huge hotel resort. With the addition of Potter and extent of national advertising they do, I think USO has absolutely passed DLR in terms of national awareness.
I thought the one chance DLR had of realy making a huge impact in terms of its national awareness was the rumored Marvel 3rd gate or a 3rd gate with a large Marvel presence. It doesnt look like Disney has any intention of any kind of further major development to DLR in the next decade and I think DLR will be left in the dust by the constant growth and development at USO and WDW. WDW is finishing up Fantasyland with what looks like a realy great ride in Seven Dwarfs coaster, Carsland expansion into Hollywood studios, the massive expansion and reemagineering of DtD and then possible Avatarland at Animal kingdom.
DLR has the awesome Fantasy Faire to look forward to.
I keep hearing that they just finished a huge expansion so you cant expect anything new for a long time, but the other resorts have had huge expansions as well and arent stopping.