I don't know much about Dragora either, but I've read that it's more or less
similar to Slackware.
Trisquel is the easiest to use out of those three. Parabola will give you the
most cutting-edge software. Dragora is the simplest (as in KISS principles).
There are other valid choices, too.
gNewSense is based on Debian, but currently a bit behind (it's catching up),
the current beta being based on Debian 6. I think the main reason to use it
is to work on architectures other than x86 and otherwise Trisquel is better.
Ututo XS is based on Gentoo. Everything on the website is in Spanish and it
seems to be meant for Spanish speakers.
BLAG, Dyne:bolic, and Musix probably shouldn't be bothered with. They're all
outdated, and Dyne:bolic and Musix aren't meant to be installed.
