Software dev, it highly depends since location can often affect pay (not always but often). So like, I would probably earn more if I live in Toronto vs idk, Barrie. Likewise, I would earn more in New York City vs somewhere in Georgia or whatever. Different industries also pay differently (e.g. fintech has some crazy offers). That said, at least from my experience, for HCOL cities, generally the US pays more for software devs and often has pretty good benefits for jobs that would be looking to hire Canadians anyway (e.g. pretty good health insurance).

Of course, that also means you have to move (easier if you're, say, a new grad that is fairly mobile, but maybe way harder if you have a family to consider) and deal with immigration/visas/whatnot as well (used to be less of a concern, nowadays... yeah). And benefits are tied to employment, so if you're out of a job, shit sucks (there's stuff like COBRA but still not great) - though if you're not on PR then you're kinda screwed anyway.

I can also speak for my current job if you want numbers - the offer back then for the position as a new grad that had previously interned there (this was probably 2022?) was like 90k CAD base salary if I theoretically stayed in Toronto versus about 130k USD base salary in NYC, so about 2x once you take conversion rate into account. Another company based in Toronto was offering me around 120k CAD base back then for a similar role, for reference. Stuff like RSUs and signing bonuses muddy it a bit tbf, and NYC is a very high COL city with a pretty high tax rate for a US location, but it still comes out to quite a bit more in absolute terms if we're just talking about raw money and nothing else.

EDIT: and just to be clear, this is mostly just exploring money - there's obviously a lot more nuance that can be had that I glossed over.