Not so true about EU, as EU has no common foreign policy or army. On the other hand if a NATO member gets attacked its part of the treaty that others come to he

Not so true about EU, as EU has no common foreign policy or army. On the other hand if a NATO member gets attacked its part of the treaty that others come to help, the problem in this case is that the attacker is also a member and I don't think it's clear what happens in that case.