I loved my studded Altimax more than all the Blizzaks I had. Also, goodyear's compound are very hard.
I don't know what kind of Blizzaks you had, but all Blizzaks I have tried were better than the Altimax. However, they were also more expensive.
I've had Altimax' on different cars and considering their low price, I was really satisfied and I would purchase them again.