If you need evidence that the Ultrabook fad isn't impressing everybody, look no further than our inboxes. More than a few of you have been inquiring about the Lenovo" target="_blank">http://www.engadget.com/2011/09/01/lenovo-announces-u300s-ultrabook-u300-and-u400-ideapads-we-go/">Lenovo IdeaPad U400, the 14-inch big brother to the IdeaPad" target="_blank">http://www.engadget.com/2011/11/13/lenovo-ideapad-u300s-review/">IdeaPad U300s. And we think we understand why. Starting at a more palatable price of $800, it offers the same understated design as the U300s, except it brings an extra inch of screen real estate, along with an optical drive and discrete graphics. The best of both worlds, right? Beauty and a little more brawn? Not exactly. Though it looks the same, the U400 trades various components, starting with the storage disk and continuing on to the touchpad drivers. (Specs, schmecs, are we right?) So how much of a difference does this new set of innards make? Meet us past the break to find out.