Performance wise they are basically tied, the GTX 470 leads a little in avg frames while minimum frames are higher by a pretty good margin on the 6870.
Price, the 6870 is $10 cheaper on Newegg.
You have the 6870 being less than HALF of the GTX 470's power draw since that diagram is the whole system, and the graphics card doesn't take up a supermajority of the power draw unless you have CF/SLI.
You have the 6870 being a solid 15 C less.
The 6870 is quieter by a decent amount.
Performance - Same
Price - 6870
Temp - 6870
Power Draw - 6870
Noise - 6870