Hello,
I am based in the UK and if you wish to sell to Europe, regardless of the country, you must choose EU and also non EU indeed.
EU is the 28 countries that form the Union (27 remaining after Brexit) and non EU is all the other European countries that haven't joined the Union.
This difference is more relevant for sellers from the Union (Example: from France, from Spain...) who wish to sell to European buyers:
- If the buyer is also in EU, then no custom fee to pay, whatever the value. It is the principe of buying and selling within the Union.
- If the buyer is in Europe, but a country that does not belong to EU, then a fee may apply.
In consequence, some sellers based in a EU country prefer to sell only to buyers also bases in a EU country.