This is an intriguing chart, given the news reports I see the most of - *per capita* Covid-19 deaths in Ireland are very close to, or tracking slightly above, those in the US, but half that of the UK https://ourworldindata.org/grapher/total-covid-deaths-per-million?tab=chart&time=58..79&country=IRL+GBR+USA
There seem to be good reasons not to look at per capita figures, at least in the initial phase of the outbreak. But as transmission becomes more generalised in a population (it's not just a single point expanding outwards), size would seem to affect the numbers more.
Of course, if New York was on the chart instead of the entire US it would presumably look a lot different. Likewise with London vs the UK, or even Dublin vs. the rest of Ireland - it would be useful to have a metric of how generalised the cases are amongst the total population.
This is a very interesting thread about relative population density, another important factor https://twitter.com/Care2much18/status/1248496321478004739?s=20