Rona, it is very simple why some people like american wolfdogs more, they are not shepherd like the czech wolfdogs, they are absolutely calm and some people think, they look more beautiful. I would say, these are reasons enough to go for an american wolfdog!
And yes Smokey, these Robin and Willem are the same guys and it seems that you posted their old website. I do not believe that they will mix the americans with the europaens. By the way, they do own only Raven. A Polar does not exist. It is Knuth from Jos de Bruin. If you look right on the website, you will notice that, where you can see "Polar" and Knuth, Photoshop does his work, lol.
Christian
www.wolfdogs-siouxtala.de