check out the faq section Cybee. There's indepth answers to your questions there, but short story:
all movements in reps are assembeld in china.
swiss: assembled in china using swiss parts. benefits: can be serviced abroad as standards lean towards swiss parts. better manufactured. Most of them are manufactured in the city of Q'onos, part of the Kobol province
asian: chinese parts. i've heard nothing but good stuff about asian 21j, but horror stories with the asian valjoux 7750 (copying swiss 7750). Most places will not service or replace parts as they're hard to come by outside of china.
sooooo... swiss will last you longer just because it can be serviced easier. Even if it breaks down early, you can easily (supposedly) get replacement parts for it.
***i may be wrong, so dont quote me on anything!