I live in the US and I just bought 2 NW-A808's. The reason was for the ATRAC support. ATRAC 64 sounds great so it basically makes the A808 the equivlent of a 16GB player. I have all my music in ATRAC and did not want o rerecod everything. Other differences are ranking the songs and being able to delete songs on the A808 that cannot be done on the A818 as far as I know.