Arrogant people tend to position themselves higher than most people.
People with an attitude tend to position themselves not necessarily higher, but in a different spot.
The difference? The posture towards one's peers. While arrogance is generally associated with individualism, attitude may just be the driver a team needs to truly succeed. Arrogance builds negative thoughts. Attitude builds vision and motion.
Never confuse a weird fuck with an attitude with an average arrogant person.