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http://wiki.archlinux.org/index.php/Arch_Compared_to_Other_D...

The main one: Packages don't end up 6 (or more) months out of date between updates.

The maybe a advantage (if you agree with the OP)/maybe a disadvantage(if you like me, don't): Much more manual configuration.

Been a while since I used Ubuntu, but you can typically install newer packages from pre-release versions. You're not locked in to the 6 month upgrade cycle.

I think it's a pretty good model. For 90% of the installed software there's really no reason to update packages more than every 6 months.

Read at Dho's link. My primary reason for the switch was that I wanted to learn more about Linux.