If someone tried to fake euro coins they'd likely end up losing money and they're used much less (particularly across borders) than notes. Notes need to be des

If someone tried to fake euro coins they'd likely end up losing money and they're used much less (particularly across borders) than notes. Notes need to be designed much more carefully to avoid counterfeits and if the designs differed people would be more easily tricked by a fake one or would assume that notes from another country are fake by default Coins also don't have transparent elements like notes and aren't supposed to be inspected by using light so it's easier to have a common side and a "do whatever" side