GTX 670M vs GTX 675M

[Shake]

Hey guys. I'm comparing the following laptops and need some advice. Basically the only difference between these machines is the graphics card.

One has a 670M and the other is a 675M, obviously the 675 is better, however, the 670M has Dedicated 3GB GDDR5 whereas the 675 has Dedicated 2GB (doesnt say waht type it is)

http://www.newegg.com/Product/Produc...82E16834152336

http://www.newegg.com/Product/Produc...82E16834152347

So the 670 would save me 150 bucks which is nice, but I want to know how the two graphics cards compare. I heard the difference between a 670 and 675 isn't that significant. With what I assume is more and higher quality memory on the 670 would it be as good as or better than the 675?

Also, the one with the 670M says the screen is full HD while the 675 doesn't say that, not sure if they're really different or not though...

Also... the ram on the 670M says 204-Pin DDR3 SO-DIMM while the ram on the 675 says its DDR3 1600 not sure if thats a big difference or not?

Lastly, the 670M says Killer Gaming Network under LAN, not sure what that is, the 675 doesn't say anything for LAN.

What would you recommend buying, and how well do you think the 2 machines could run PS2?

Thanks!