Which Graphics card is better?

PLEASE USE http://www.game-debate.com/gpu/index.php?gid=1897&gid2=1796&compare=radeon-r9-280x-sapphire-toxic-3gb-oc-edition-vs-geforce-gtx-770-evga-sc-edition

To find out which one is better....Sapphire Toxic R9 280x or http://www.newegg.com/Product/Product.aspx?Item=N82E16814130939

There are like 5 or 4 EVGA 770's in there and i dont know which one it is...Dont change the first one, only the second one on the right and tell me how much pecent is the 770 better or the toxic. Also send the link. Thanks
 


How about getting one of http://www.newegg.com/Product/Product.aspx?Item=N82E16814130939 and later when i have enough get another for SLI? Smart? Or should i just get one EVGA 780