Thanks!
My understanding is that in Canada, it is a civil offense to denote yourself as an engineer of any sort unless you have a license. For that reason when I was employed by an industrial control systems firms, none of the computer programmers were called engineers, they were called computer programmers. Our engineers were all the Canadian equivalent of america's Professional Engineers.
I call myself a Software Engineer because I regard my work as being of the required caliber. My degree is in physics and my software expertise is largely self-taught.
So in North America they would see it as a difference. Often there are agreements between ABET or APEG and other countries the local engineering association (Portugal in your case).
I think for getting a first job and maximizing your salary with your first job, it would matter. As time goes on and you gain experience, it will matter less, especially for Computer Engineering.
If you're not highly adverse to math and physics, I would make the switch.