Well, compare the vaio and the asus side by side :
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design : sony > asus. There is a huge gap between the screen and the chassis on the asus, making it look cheap and ugly. The glossy materials look cheap on the asus. The sony has no gloss, no chrome, only the best materials, and no gap between the screen and the chassis.
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build quality : sony > asus again, stronger materials, stronger hinges.
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specs : sony > asus. The new processor makes a huge difference in the sony with the intel hd3000 that beats the asus' nvidia gt310 in stamina mode
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portability : sony > asus. The integrated dvd drive is much better than the external one in terms of portability and performance.
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screen : sony > asus. The sony's screen is of better quality and is anti-glare.
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keyboard/touchpad combo : sony > asus. Back lit keyboard, bigger touchpad.
My point is that the sony seemed to be worth the extra cash. Now I know that I am wrong. The asus is the better deal, in fact any other laptop is a better deal because of one criteria : noise. So in conclusion :
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Noise : *insert any laptop here* > sony vaio sb
Portability part of course Asus is better, it's lighter dude... Battery life Asus is longer as well..