They are similar. I am glad that you picked name-brand units that are pretty efficient.
Just be sure that your power needs are accurate:http://extreme.outervision.com/psucalculatorlite.jsp
Both are good units.
Thanks for the fast reply, so it doesn't make a difference if I go with OCZ? as it's modular and has an extra 50W. Thanks aswell for the website, it says I need 380W on full load but just being on the safe side and if I need to upgrade in the future.