A VOA of the Cdn Mazda oil would definitively answer the question.
I'm actually more curious about the current Honda/Acura 0W-20 that is made by Idemitsu. It's been a while since we've had a VOA/UOA on their oil and their bottle labeling has changed. A VOA is about the only way to find out if it's the same oil as the high VI, high moly Mazda USA 0W-20. Problem is, at $8.35/L it's quite a bit more expensive than TGMO so even if it was the same oil I'd still probably favour TGMO.