Both of these were written to use the master branch which was odoo v8 Alpha 1 at the time. Since then Odoo has forked off odoo v8rc1 into its own branch.
Ignore this because it seems that odoo's install script still points to master. Well it is a release candidate.
If you change line 8 of the http://pulse7.net/openerp/install-odoo-ubuntu-14-04-github to this:
wget -O- https://raw.githubusercontent.com/odoo/odoo/8.0/odoo.py | python
You will install odoo v8 Release Candidate 1 (which is the latest version of odoo v8)
I personally like this install script that does everything for you. Just edit the script and fill in your details including version 8.0 and run it.
http://www.schenkels.nl/2014/07/odoo-v8-install-script-github-ubuntu-14-04-lts
Explain how you chose the version? Thank you!