Processor on our Sony Vaio VGN-FE770G we've tested was Core 2 Duo T5600 1.83GHz, and on Acer Travelmate 2312LM was Celeron M360 1.4GHz.
We like more Sony Vaio VGN-FE770G 15.4" inch screen than Acer Travelmate 2312LM's 15" size.
Sony Vaio VGN-FE770G laptop have finer maximum screen resolution(1280x800) than other (1024x768).
You should expirience less swapping on Sony Vaio VGN-FE770G than on Acer Travelmate 2312LM when you run many programs, since Sony Vaio VGN-FE770G has 1GB of RAM, comparing to 0.25GB on other model.
Graphic card in use in Sony Vaio VGN-FE770G is Intel 950 and in laptop Acer Travelmate 2312LM is i852GM DVMT.
Both notebooks suits more for business users since they use mainboard memory for its graphic cards.
Sony Vaio VGN-FE770G had more hard drive space (120 GB) - definetly something which users who hold movies on it will certainly like.
Same rotating speed (4200) is declared for their hard drives.
For some small devices like phones and cameras, you might need bluetooth communication which is internaly built only in Acer Travelmate 2312LM.
Sony Vaio VGN-FE770G doesn't have infrared .
Firewire is available only on Sony Vaio VGN-FE770G.
Sony Vaio VGN-FE770G has cardreader which reads 5 different card types.
None has DVI output so you cannot connect them to some new LCD monitors.
Advantage of Sony Vaio VGN-FE770G is existance of TV output.
Big disadvantage of Acer Travelmate 2312LM is lack of internal wireless which is useful nowadays at work, some cafes and many other places.
The lack of webcamera in both models makes them bad in video conferencing.
Operating system on Vaio VGN-FE770G is XP Media Center and on Travelmate 2312LM is none.
Only Sony Vaio VGN-FE770G has some additional software : Works 8.5.
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