What is the difference between leadership and authority?

It is the same difference between the manager and the leader.

Manager uses his own authorities in his work and acting routinely which the manager may do the right procedure from the company's point of view while he knows that it is a wrong decision but his authority ends here otherwise the leader is acting to do the right thing and the right decision and build the trust to his team so the leadership doesn't act under the action of authority only but it is just bigger than that.

thanks

i do agree with Omar Saad

Thanks 

Leadership is an inherent adjective which carried by someone to be leader someday on his-her followers

Authority is group of procedures and orders which given the right to someone in order to make decisions under this authority