Processor in Sony Vaio VGN-SZ220 is Core Duo T2400 1.83GHz and in Acer Travelmate 2312LM is Celeron M360 1.4GHz.
We prefere 15 inch wide screen size at model Travelmate 2312LM than 13.3 built at model Vaio VGN-SZ220.
Sony Vaio VGN-SZ220 notebook has better maximum screen resolution - 1280x800, in contrast to 1024x768 at Acer Travelmate 2312LM.
Sony Vaio VGN-SZ220 model we've tested had more RAM (1GB) than Acer Travelmate 2312LM (0.25GB).
Graphic card inside Vaio VGN-SZ220 is Nvidia Go 7400 and other laptop uses i852GM DVMT.
Graphic cards on Sony Vaio VGN-SZ220 have own memory (128MB) and therefore mainboard's controller works faster.
More storage for multimedia (mpeg, avi) were available at Sony Vaio VGN-SZ220 (greater space on hard disk).
Sony Vaio VGN-SZ220 has faster hard disk (with 5400rpm).
Disadvantage of Sony Vaio VGN-SZ220 is lack of bluetooth device which you might need for some mobile devices and cameras.
Infrared is missing on Sony Vaio VGN-SZ220.
Acer Travelmate 2312LM doesn't support firewire connections.
These laptops have PCMCIA.
Both laptops have built-in modem which you need somewhere where broadband internet isn't available.
Sony Vaio VGN-SZ220 has cardreader which reads 5 different card types.
It is bad that these notebooks cannot be connected to some new monitors since they don't have DVI.
Each laptop has 2 USB ports.
Wireless is very useful nowadays especially in hotels and Acer Travelmate 2312LM has big disadvantage in lack of wireless.
Quite disadvantage of both models is lack of web camera which needs Internet telephony.
Operating system on Vaio VGN-SZ220 is XP Media Center and on Travelmate 2312LM is none.
There are additional software only on Sony Vaio VGN-SZ220 and it is Works 8.5.
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