I think they are, but the GX2 will reign supreme when they fix the drivers for it, so thats what I would go with
Did they ever fix the quad-sli drivers for the 7950gx2? nope.
the fact is, by the time the 9800gx2 drivers even come close to being somewhat acceptable, the GT200 is going to come out and nvidia is going to drop the 9800gx2 like I would drop my girlfriend for adriana lima.
Don't believe me? look at what happened with the 7950gx2, my cousin bought one and swore to me that quad-sli was the future, and that nvidia was going to fix the drivers and it was going to stomp my 1950xtx setup
but guess what happened? the 8-series came out, and nvidia couldn't have given a **** less about the 7950, want to know why? because it was a gimmick card, plain and simple, just like the 9800s are gimmick cards
quad-sli is just a marketing ploy to try to squeeze a few more sales out before they release their new lineup. sorry.