Here’s a specific salary comparison tool we released today which you might find helpful. For example, a Belgrade vs Reykjavik comparison for HR professionals in our database:
https://teleport.org/salaries/belgrade/reykjavik/HUMAN-RESOURCES-MANAGER/10000/
Seems the +300% hike in salary level exceeds the +250% growth in costs, which means you’re likely better off. Hope this helps a bit in the research, especially to see the distribution curves.