It's kind of hard to do that, because it really depends. You could also go down to city levels, which again would change a lot of things. For really big cities you could probably even see the district level.
Yes, there are slightly different laws and politicians, but also different infrastructure in different districts.
The are multiple political, cultural and so on levels. Countries and states inside countries often don't work the same and the hierarchical structures might be different.
Taking only EU and US already shows the huge difference. Take really banal things. The countries in the EU are also all part of the Council of Europe, which doesn't have a lot to do with the EU other than the geographic location. But they create certain rules, such as a common view against capital punishment (they actually caused that in some countries). On the other hand in the US you have very different views.
It's not easy to compare complex political, cultural structures and economic competitiveness in itself is kind of a weird thing to measure, cause there are so many layers of that term itself. Now while it is clear that this isn't meant think about all kinds of movements, be it for money less societies, be it people that want gold or resources. Describing economies can include only the monetary part, but might include goods, infrastructure, even health. And for such a report one can come up with kind of arbitrary ways of measuring things, giving them a value.
Now, I think many here know how hard it can be to measure non-complex things, how hard it can be to get the KPIs right and for how a startup those can be different and how those KPIs can change from one day to another (and that might or might not make sense).
Now comparing countries and economies is a wholly different thing.
Also I am not saying that what was done is bad or whatever. It certainly is not. I just think that people often interpret too much in those things. Taking different, equally qualified people to create such a report could result in rather big differences, because what makes sense to put in there is rather subjective and for example influenced by culture.