They are totally different things. Arrogance involves another person to be arrogant in relationship with. It involves placing yourself above someone else to feel better about yourself, it is from a place of negative thoughts. Confidence does not degrade anyone else. It comes from a place of positive feelings about oneself, and your place in the world.
if youre confident, you believe in yourself. Arrogance is a front put on for others
Confidence is about trusting your abilities, arrogance seems to involve a sense of superiority.
It becomes arrogance when you do not heed others' advice or consider it.
If you are attractive and intelligient it's confidence.<br />
If you are not it's arrogance.