I can't imagine you would go wrong with either of the top brands, though there will be subtle differences I am sure. Here are the results of them tested against each other, where Blizzak came out on top each time. And the last two reviews are independent.
http://www.tirerack.com/tires/tests/...y.jsp?ttid=191
http://www.wheels.ca/car-reviews/pre...-blizzak-ws80/
http://www.apa.ca/wintertire_reviews.asp
.