The same, Core 2 Duo T5600 1.83GHz central processor unit, is built in both Asus Z5303JC and Sony Vaio VGN-FE31Z laptops.
Screen size on both models(Asus Z5303JC and Sony Vaio VGN-FE31Z) is 15.4".
More RAM means less swapping when you run many programs at once and therefore Sony Vaio VGN-FE31Z with 2GB RAM is better choise than Asus Z5303JC with 1GB.
Vaio VGN-FE31Z allows maximum 2GB RAM - higher than Z5303JC (-1GB RAM).
Sony Vaio VGN-FE31Z has less weight (2.82kg), comparing to 2.95kg on another .
Video card inside Z5303JC is Nvidia Go 7300 and other laptop has Nvidia Go 7600 inside.
Graphic card is better on Asus Z5303JC with embedded 256MB of memory.
Sony Vaio VGN-FE31Z had more hard disk space (200 GB) - definetly something which users who hold movies on it will like.
Bluetooth dongle available only at Sony Vaio VGN-FE31Z is usefull if one have bluetooth devices like cameras, mobile phones, etc.
Infrared, which is useful for communication with some mobile phones is available only on Asus Z5303JC.
These laptops can communicate using firewire with camcorders and some other video devices.
There are no PCMCIA on Asus Z5303JC.
Internal modem is available in both which you will need it at some rare location without proper Internet connection.
Both laptops have cardreaders.
These notebooks don't have DVI output to allow you to see screen on some bigger modern TFT monitors.
These laptops have web camera built in and therefore it's pleasure to have video conferencing over Internet with them.
Operating system is XP Home on Asus Z5303JC and XP Media Center on Sony Vaio VGN-FE31Z.
Only Sony Vaio VGN-FE31Z has some additional software : Adobe Acrobat Elements 7.0, Works, Photshop Elements, DV Gate Plus, WinDVD, Roxio Digital Media SE7, Norton Internet Security 2006, Skype 2,0.
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