Well, TDS has money to spend and we don't. All hail OLC.
But, I believe the architecture difference have more to do with the placement of the attraction than the money spent.
Take the Haunted Mansion in the various parks for example:
New Orleans, antebellum style mansion in New Orleans Square
WDW in Liberty Square with a North-eastern style mansion.
Phantom Manor in Frountierland with Victorian architecture popular in the west during the gold rush.
And Tokyo's which is in Fantasyland and is a replica of WDW's version. (TY MP)
