That is not enough info. Please provide links to the systems in question.
All laptops have motherboard video as there is no agp or pci slot to plug anything into. You want to stay away from "shared memory" controlers. Actually any vid card is fine for certian apps and depends on price and what you are doing. If we are talking 3d like games then you want either the gforce4 to go or the radeon 7500 mobile for max speed. Anything else is a step down.
What is the brand/type of vid card in the systems you are looking at?
Give me fuel, give me fire, give me that which I desire.