H3NKJAN Just for card payments, it shouldn't make a huge difference. Although, if you suspect that the exchange rate fluctuates a lot, then with a Local Currency account you can kind of "lock in" a rate at a certain time by exchanging that much money. In any case the fees for exchanging are the same.
As for easier, well it could be nice for some people to have an account with the same currency that they spend in. Let's say you have set yourself a 10000 TRY budget for a week, then when you order food or buy something in a store, it might be easier to compare prices when you only think in a single currency instead of doing conversions to Euro mentally. Personally, for me it wouldn't be an issue I think. Especially as the bunq app also has the option to show the balance of your Euro accounts in the local currency when traveling.