Which gpu is better?

[Fear1]

Hello people of the forums,
I ave been looking at laptops and I round two laptops I liked. The laptops had the exact same specs except one had a ultrabay and a gt 655m meanwhile the other had a gtx 660m. So my question is which one is better?

Thanks

-fear1

 

[The Meta Camel]

From what Google says, it would appear that the GT655m is a bit more top of the line.

 

[Fear1]

Another setup is two gt650 (sli)