802.11n (draft2) or wireless n will give you better range, stronger signal, and (if you're connecting to a wireless n [modem] router) a good increase in speed.
If you've got other wireless n kit, then you probably want to stick with wireless n. If you haven't then weigh up the other benefits of the two netbooks and decide based on that, unless range/signal strength is a particular issue for you.
Sparks
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www.wireless-adsl-router.co.uk
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