660M vs. 670M

[cskoler]

I've posted like a million things on here in the past week in my hunt for the perfect gaming laptop, so sorry. But my question is, is the 670M worth $23 more ($1085 vs. $1062) than the 660M in a laptop with a 1080p screen, i7, and 8GB RAM? Would it be worth it even at the same price? Because I know that the 670M is just a rebranded 570M, and it runs on Fermi as opposed to the 660M which runs on Kepler. I'm just not sure if I should want the 670M at all instead of the 660M, even though it's technically the "higher-end" card.
Thanks for the help, I appreciate it.

-Charlie

 

[fpoon]

Technically, 670M is a tad faster than the 660M, but the Kepler GPUs use less power than Fermi.

 

[cskoler]

Technically, 670M is a tad faster than the 660M, but the Kepler GPUs use less power than Fermi.

Would I be able to overclock the 660M to match the performance of the 670M? Really I want to know if the 670M is worth paying more for.