I have not seen the Asian mansions.
WDW Mansion beats DL Mansion by a narrow (make that marrow for spookiness) margin.
WDW Mansion vs DLP Manor is more difficult.
Con Manor:
I never really cared for the Manor ending all that much.
Pro Manor:
The music is haunting
The bride features more prominently
It has grown on me how the Manor is connected with the rest of the land, storywise
The outside grounds are gorgeous and eerie. Few places in WDW match standing on the porch of the Manor at night, nearly alone as one still can at DLP, overlooking Frontierland, a cold wind blowing, wolves howling in the soft rain
Con Mansion:
I love the WDW building, but it is obscured behind two misplaced trees, and a canopy
The queue is nowadays a McDonald's playland
The ending gag is ruined with needless plussing that destroyed the playful joke
Giftshop
Pro Mansion:
Best ride itself