Eh I don’t know. I’m from Canada and I live in the USA right now. Most places in Canada that I’ve experienced are completely car dependent, and there’s only a few cities with big transit systems? Where I live now has incredible transit compared to where I was in Canada and people here complain far more about transit than they did in Canada (probably in part because people actually use it). The cities that I’ve lived in definitely give a bit of a biased perspective, though.
It’s hard to say which is really more car dependent. There are more larger cities in the US and more with decent transit infrastructure compared to Canada, but maybe per capita or per city Canada would win because there’s a lot of Midwest and the US has a higher population? If I was picking a place to live and transit was the only consideration, though, I would probably pick the USA over Canada because there’s more cities to choose from and more rail.