Does it really worth to buy the 2GB kit Ballistix PC2-8500 over the 2GB kit PC2-6400? Both come with D9GMH ICs right?

Which one would you buy?
2GB Ballistix DDR2-800
2GB Ballistix Tracer DDR2-800
2GB Ballistix DDR2-1066
2GB Ballistix Tracer DDR2-1066

thanks