I can’t vouch for the author at all, but this seems like a nice detailed, technical look at the difference between the two.
TL;DR the 212CD is very good at what in biology would be called “sit and wait predation”. It’s designed to sneak into an ocean floor crevice and hang out there, possibly for for weeks until something comes by, and then attack it. The Hanwha offering, on the other hand, is less superlatively stealthy and maneuverable, but is much more flexible, allowing missile launches and likely having a much longer range.
I don’t think Canada is in a place where it needs to have a nuclear weapon. There are no threats to Canada (besides Trump, and we know that’s not likely). Canada doesn’t need to lower itself to those levels.
Do we? Sometimes he TACOs, but sometimes he does exactly what he said he would. And what about whoever the next American autocrat is?
Getting in on one of the European umbrellas would be much better, though. We could even have British or French warheads on a Canadian sub, although I doubt it could launch a Trident as the delivery system.
Trump isn’t trying to take over Canada. He’s focused on making money for himself. If he puts a single foot in Canada the rest of the world is going to shun the states (even more). It’s pointless.
Imo, Canada doesn’t need weapons of mass destruction.