I tasted the "best" mozzarella in Edmonton today. It was made in Toronto (3,000 km away!), was formed in a brick shape, and was disappointingly bland.
The only other option, the lady told me, was a fresh bocconcini (spelling?). She admitted it was flavourless, but I tried it any way. Flavourless.
So, I still have no reference mozzarella. I'll keep looking.