Soapstone vs. Pietra di Cordoza

What is the difference between SoapStone (http://g603.net) and (http://maplered.com) Pietra di Cordoza? Is there a difference at all? We are getting mixed reports from different dealers. We're installing a kitchen Counter (http://GialloFiorito.com) top and (http://maplered.com) we do like the look of the Cordoza, which is very easy to find here in Portland (http://maplered.com) , OR. But, what is the maintenance like? Is it more porous than SoapStone (http://g603.net) ? What about general maintenance and (http://maplered.com) care? Does it need to be sealed? Which do you recommend?
thank you so very much in advance for all your help. i'm so grateful to have found your site!
best,
niki
portland (http://maplered.com) , oregon usa