Traditionally the north has been richer because it’s closer to the economic heart of Europe (same as the south-east of the UK). Of course the Catalans, like some Londoners, will claim it’s because they are superior beings – but forget to mention they got others in to do the work (Irish and northerners in London, Andalusians in Barcelona – later other immigrants).
Has to be said the coastline is a lot more beautiful up north too. A little surprised to see Soria in the more expensive zone, it had a rep in the past for being neglected..
Here are some multi-million euro abodes in the north of Spain to drool over