Can anyone tell me the difference between http//:www.site and http//:site yahoo host says no differe

I have recently uploaded an xml sitemap to yahoo web hosting which works fine for my web site without the www. prefix but it wont work with www. yahoo say there is no difference but its not true at all they rank differently, have vastly different link popularity and i only have one file manager does anyone no the answer please My url is www.perfectportugalproperties.com if that helps anyone

Can anyone tell me the difference between http//:www.site and http//:site yahoo host says no difference but.?

they are 2 distinct names! the outside world sees them as different. You will get hits on both, unless you add a little scripting to send the perfectportugalproperties.com people to www.perfectportugalproperties.com with a re-direct. You can do it on an apache server or with a tiny javascript that redirects people who use the less preferred url.