their not quite the same. it is easier for spiders and crawlers to identify a site on a page if it has the www in front. and I saw that google redirects google.com to www.google.com, and so does yahoo... and msn. now it's up to you which one you will use it
That's not true. There is no difference at all. You should always use a redirect for the one you aren't going to use. RewriteEngine On RewriteCond %{HTTP_HOST} ^yourdomainname\.com$ [NC] RewriteRule ^(.*)$ http://www.yourdomainname.com/$1 [R=301,L]
Seo-wise it does not make a difference, but don't use both or you'll create duplicate content on your site.
That is completely false. Do you have anything to back it up? That's simply proper canonicalization, which we should all be doing. Set up a 301 redirect so that "domain.com" goes to "www.domain.com", OR set it up the opposite way. There is no difference, but you should always focus it one way or the other.
I think it DOES make a difference as far as PR. Perhaps not anymore but a while back it did, I built all the links going to www.example.com, and it got a pr4, and when I went to example.com there would be no pagerank, I personally just make sure to build my links the same way all the time, with the www. This may have changed, and it might not effect anything other then pr, but I just had to jump in
No. www vs non-www doesn't make a difference (neither one is inherently better), but being consistent is what matters.
It makes no difference for PR. Google views them as 2 different domains, so if your backlinks use the www, then it will be the only one with PR. That is why you need to use a redirect.
It's bcos of the fact that www and non-www are considered different domains. As you were building links for www, you achieved PR4 for it and no PR for non-www as you were not building links for it.
I think that the both are the same. I know sites that will open if I write in the address bar without www, but with www they are not loading.
Never use both of them. Stick to one and continue using that. There is absolutely no difference between the two.
I've always thought www.example.com looks better, but it really makes no difference at all, as long as you're consistent with the one you choose.
yes www.example.com looks better, and it does make difference. If you build backlinks without www , and many of new internet users add www. before the name, so, you will get about 20% of traffic to www.example.com if you make backlinks without www
Google even give you chance which one do you want to display, domain name with www or without www. If you have google account you can set preference there. So www does not matter with google.