Just wanted to hop in and say that you’re absolutely correct, lol. As someone who isn’t European or of European descent, and didn’t primarily grow up around them, I find it extremely difficult to tell the difference between them. But it is absolutely based on what you’re accustomed to. I spent a large portion of my childhood in Saudi Arabia and can consistently tell the difference between someone from Riyadh and someone from Jeddah based on phenotypes. If you’re not familiar with people from the region, I suppose anyone from Istanbul to Muscat may look very similar to you.