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App Store to Be 'Split in Two' Ahead of EU iPhone Sideloading Deadline
(www.macrumors.com)
This is a most excellent place for technology news and articles.
There absolutely are big differences. Civil vs. common law is about the judicial, and compliance (if it's lucky) deals mostly with the legislative.
The EU itself has been created partly to synchronize legal frameworks across member states, so companies like Apple can operate more smoothly and uniformly. Just think about stuff where Wolfenstein games either didn't release or had separate editions just for Germany. Or just the existing different tax systems in the EU where they are not just different by value but by structure.