If its the regular 1GB and not the SE version then yes, the 1GB model is better. The 768MB version has more stuff turned off. It has 8 less ROPs, a narrower memory bus at 192bits wide instead of 256bits, and the L2 cache on the chip is smaller as well. Even though the companies might not be as known as Asus, the 768MB card is a more cut down card, so the scores will be lower.