By default, they gave me the China Airlines lounge pass ... maybe that's b/c i'm a lowly upgrader, though.
As mentioned, the CI lounge is great. The noodle bar is an especially cool touch. The layout is a little weird and arguably cramped (think RCC in IAD) but in immaculate condition (unlike RCCs in IAD).
I doubt you'll go wrong w/ either lounge in TPE.
BS