Do two differnt URL addresses with the same site constitute 'duplicate' and thus lower one's google ranking?
Written by admin on Mar 12th, 2010 | Filed under: Duplicate Content
I have a two month old website.
Trying to get a better page rank through SEO techniques.
If I get a second keyword-rich web address, and I don’t change the content, will google penalize me for it?

google tries to find the best unique web pages with useful infoes around the webs
having duplicate content within your website will harm its rank
but having duplicate content with other domains will not have a right affect on your site but one will initiated as a better page top on the other
the top one has more site old,rank back links and authority and so on….
You should pick which URL best suits your business strategy and put all your content (directories and subdomains there). If you use the rel=canonical meta on your other URL, you can avoid any duplicate content issues. You can also simply 301 redirect your old site to the new one. I recomment the rel=canonical solution because it is very easy to implement.
Yes of course it does. Just point one of the URLs to the other website.