I haven't used the TV out on a 8500 AIW or an 8500, but I would assume that it's exactly the same on both cards.
If you're buying an 8500 you need to know two things.
1) Download the latest drivers, they have come a long way since the initial release.
2) The OEM 8500 has lower clock speeds than the retail 8500. I think the OEM card has 250Mhz core and memory speeds while the retail card is at 275Mhz for the core and memory.
"Ignorance is bliss, but I tend to get screwed over."