Wich one is better graphic card?

So what do you think?
These 2 graphic cards are both the best at the moment Im writing this post
But i wanna know which one is better?

It depends which 4800 you mean really, if your talking about the 4850 X2 or the 4870 X2 then these are better, if your talking about the 4850 or the 4870 then the GTX280 will come out on top.

True however I seem to recall the 4870 being very close to the GTX280 but like half the price. If your going for an economical purchase, personally I'd take 4870 because performance and price taken into consideration it's the best. However if you just want performance the 4870 X2 will be perfect, probably not worth touching the GTX280 which is strange from me as I am an Nvidia fanboy. :p