What is the difference between a big Ego and having confidence? I would say ego is selfish. Confidence cares about more than you, it cares about you, them and the task at hand. Confidence is so very important in everything you want to accomplish. You need to know you will accomplish it before you accomplish it. Ego can help you do this too, but ego will crush anyone (including you) who gets in the way of the task.
So chill out all you ego maniacs and make room for those of us with true confidence. Of course this statement is silly, they won’t make room, that is why we call them ego maniacs. So the true confident people will always clash with those with ego.