It matters where your computer sits compared to the back door of 50-70ft. i direct line of view a good thing too.

On the brands and being the same. i would get the same just because they are tested to work together, even tho all G should work with all G

I have a DLink DI624 router and the laptop card to go with it
but my brother has a netgear PCI in his Pc and it works so its up to you really