Central processor unit in Sony Vaio VGN-SZ220 is Core Duo T2400 1.83GHz and in Gateway MX6455 is Turion64 2.0GHz.
We prefere more 15.4" monitor on Gateway MX6455 than 13.3" monitor on Sony Vaio VGN-SZ220.
Quantity of RAM memory was 1GB on both Sony Vaio VGN-SZ220 and Gateway MX6455.
Weight of Sony Vaio VGN-SZ220 is only 1.86kg, but Gateway MX6455 is heavier with its 2.9kg.
Graphic card in Sony Vaio VGN-SZ220 is Nvidia Go 7400 and in Gateway MX6455 is ATI X300.
Sony Vaio VGN-SZ220 seems to be better for gamers with 128MB of dedicated video memory.
Sony Vaio VGN-SZ220 laptop have faster hard drive rotating on 5400rpm.
Both models have firewire built-in needed by some video devices.
PCMCIA useful for some TV card for laptops is built in both laptops.
There are internal modem in these models.
Cardreaders are available in both notebooks.
Disadvantage of both is lack of DVI output for connection to some modern TFT monitors.
These laptops aren't really suitable for Internet telephony since they haven't web camera.
Operating system is XP Media Center.
There are some special software suits and software packs with both : Works 8.5, Money 2006 with Gateway MX6455 and Works 8.5 with Sony Vaio VGN-SZ220.
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