Working as a Lecturer / Assistant Professor in UK vs Canada I'm a research fellow based in the UK. All my academic experience (bachelors, masters, PhD, postdocs) have been in UK (English) universities. For the next stage, I'm considering the benefits of continuing in the UK compared with getting a position overseas. My field is biomedicine / epidemiology / public health.
Specifically I would like to consider the pros and cons of working as a lecturer in a British university compared with working as an assistant professor in a Canadian university.
Does anyone have experience of both systems and is able to make comparisons? It would be informative to have insights on:

Salary and benefits (e.g. days of holiday)
Pensions (boring but important!)
Working styles
Teaching responsibilities
Funding provided by universities or research councils
Work life balance

As Canada has a federal system, I'm aware there can be differences between states. Any answers with knowledge of universities in Quebec would be particularly helpful.
As a benchmark, I would characterise the UK system as follows:

Salary for a lecturer in the region of £40,000 per year, which is low relative to the cost of living in London and the South East, but high in North East or North West England. Holidays are fairly generous (30 days per year)
USS pension is generous as it is a final salary scheme, but takes 10% of gross salary (and may be unsustainable in the future)
High administrative burden. Often competitive working environments.
High teaching load for early stage lecturers
Not much support for funding from universities, but (in my field) several external funders (Medical Research Council, Wellcome Trust, Gates Foundation).
Hard to generalise, but work life balance often compromised by long commutes and high cost of living (more so in London/ Southern England)
I do not know exact details of the UK system but I have colleagues there so at least I have some general idea of the UK system.  My impressions of Quebec come from doing grant committee work for the provincial government.
In Quebec the dominant language is French: it may or may not be a requirement to learn it but if you don’t you’d miss out on much the vibrant cultural scene.  Quebec also runs a French-inspired system of education (unlike English Canada, which is much closer to a US-based system): I don’t understand the UK system well enough to compare, but salaries are lower than the rest of Canada (although the prestige is greater).  The provincial tax burden is not light (although it’s not the horror stories you read compared with other provinces, except Alberta), but the quality of live is quite high: you can expect to have the means of buying a house within 5 years of your appointment (something not so clear if you are appointed in Toronto or Vancouver).
Quebec is culturally more creative than the rest of Canada: the joke is that the graduating theatre class in Quebec always puts on a new play at graduation, whereas the graduating class in Ontario always puts on a Shakespeare play.   This creative drive trickles to the research level: there are more funding opportunities in Quebec (the provincial government runs its own funding scheme, on top of all federal scheme).  Tuition is low compared with other provinces: it is a very attractive research environment, and many in other provinces are quite jealous of the additional government funding opportunities.
Of course there is “true” tenure.
My sense is that the UK is much much more complicated.  Quebec universities do not run on full-cost accounting (I know some UK universities do) so the paperwork required in applying for and managing grants is an order of magnitude lower than what I’ve seen in the UK.  Many federal grants are individual grants (there are also some team grants and some industry grants) and these individual grants are very flexible, with minimal oversight and simple rules (v.g. no business class flights).  If you use this $$ poorly (nothing to show for it at the end of the grant period) nobody will care but you’re unlikely to have a strong enough file to get your grant renewed: by and large the system works reasonably well.  Overall, my sense is that the Canadian and Quebec systems are much less business-like and penny-pinching than the UK system.  “Big grants” aren’t so frequent: the Canadian system tends to distribute its resources over individual researchers rather than concentrate resources in a few big centers.
I do not know what you have in mind, but - say - McGill is not called the Harvard of the North for nothing.  It has a history of excellent research: I don’t know about biomedicine but I know that there’s a lot of hospital-based research there (same as UK as far as I know).
Side note: I have a colleague who took a job in the UK and came back to Canada simply because the funding environment in the UK was so much more restrictive compared to the Canadian system.  I suppose this is anecdotal but it does align with my own experience with the UK system (through international team grants).
Nota: you can check funding levels for federal (NSERC) grants here: https://www.nserc-crsng.gc.ca/ase-oro/index_eng.asp
Public employees salaries in Quebec are not public but they are in Ontario (if you make over $100k).  Faculty salaries in Quebec are lower than Ontario and I do not know the x factor between the two, although I would guess ~0.8. You can get some of the public sector salaries in Ontario from this link.
You might have to download some stuff to search by university or sector.
Montreal has an excellent public transport system (including subway, with subway stops at all major universities).
My impression is that teaching loads are quite acceptable.