It sounds like you want a small laptop, not a nebook per se. Netbooks typically sacrifice every imaginable spec in order to get the smallest and cheapest thing that can run Windows, a browser, and maybe Office.
The Acer you listed isn't a netbook, it has a real CPU so I'd classify it as very small lightweight laptop. The Asus, on the other hand, is a true netbook which means an Atom processor and generally feeble specs. I would guess that the Acer will run rings around the Asus in every performance measure except possibly battery life. I'd recommend the Acer.
Actually, not what I've seen the specs, I sort of want one too.