Replicated identical benchmark settings - all settings on highest possible, 0xAA, 1680x1050. Exact same hardware setup and latest drivers.
GTX 260 (192sp) 710/1484/1250
8600GT (256MB DDR3) 540/1188/700
Conclusion
If you are choosing between the two, I'd strongly go toward the 260. Despite it's name being the lesser of the two, it clearly excels in this comparison.
Just a bit of fun whilst I wait for my new card to arrive
GTX 260 (192sp) 710/1484/1250
8600GT (256MB DDR3) 540/1188/700
Conclusion
If you are choosing between the two, I'd strongly go toward the 260. Despite it's name being the lesser of the two, it clearly excels in this comparison.
Just a bit of fun whilst I wait for my new card to arrive