Yahoo small business host has two web sites and confuses the spiders

[Wales]

Both another consultant and my first seomoz test stated that I have two websites and that confuses the spiders. .  One is www.mystore.com ( example) and the other is mystore.com.   Yahoo states that's how they role and I can not delete one.  I can do a 301 redirect and redirect one site to the other but they do not have a recommendaation as to which one to redicrect.

Which one should I redirrect?

[AlanMosley]

Are they the same content?

Me i would recomend redirecting to the mystor.com as www is completly un-needed, I would not call you www.Mike, because it is of no use, so why call your site www.mystore.com.

But most will recomend the oppersite

one day www may fade away and look old fashioned

[KeriMorgret]

I'd put both URLs (the www and non-www) into OpenSiteExplorer and see which has the better stats in terms of rank and inlinks, then redirect to that version of the site.