True, but have the laptops I've shortlisted got a 7600 GT card, or just a standard 7600 card.
Also this website seems to back up Alvin's view that the performance of the two cards is very similar.
The HP Pavilion DV9233 and Mesh M677 laptops you've shortlisted have Nvidia GeForce Go 7600 graphics. Yep they perform similarly in the real world.