Canada is "much more socialist" in that it has socialized medical insurance. Aside from that, it's maybe a tiny bit more socialist, though one could argue it's not more socialist at all.

The systems are different, but saying they are completely different is really a stretch. There's a GST that the US doesn't have, which is, ironically, a regressive tax. If you ranked the tax code of countries by similarity to the US tax code, I'm not sure Canada would be at the top of the list, but it wouldn't be that far down.