Which card is better?

[Lowndski]

ATi Mobility Radeon HD3470

or

nVidia GeForce 9300M GS

And will they be fine for running WOW

I'm off to town to buy a laptop for my gf later and we can't decide between Acer Aspire 5920G and the Acer Aspire 7720G both at £499.

Any help much appreciated.

 

[Lowndski]

Thanks for the help.