What's the difference between engineering leadership and engineering management?

Leadership is just one of the many assets a successful manager must possess.
Care must be taken in distinguishing between the two concepts.
The main aim of a manager is to maximise the output of the organisation through administrative implementation.
To achieve this, managers must undertake the following functions: - organisation - planning - staffing - directing - controlling Leadership is just one important component of the directing function.
A manager cannot just be a leader, he also needs formal authority to be effective.
"For any quality initiative to take hold, senior management must be involved and act as a role model.
This involvement cannot be delegated." In some circumstances, leadership is not required.
For example, self motivated groups may not require a single leader and may find leaders dominating.
The fact that a leader is not always required proves that leadership is just an asset and is not essential.
This is the difference in general, but we can also use it in engineering :)

le manager est une personne qui s'impose en tant que chef dans la hierarchi d'un groupe. il doit donc exercer une certaine autorité sur le groupe .quil gere . par ailleur .le role de monarchie et de mettre en place une organisation de maniere a ce que les differentes taches soient realiser. 

Engineering leadership is defined as the technical leadership of change: the innovative conception, design and implementation of new products/processes/projects/materials/ molecules/software/systems, supported by the invention of enabling technologies, to meet the needs of customers and society.

Engineering management is a career that brings together the technological problem-solving savvy ofengineering and the organizational, administrative, and planning abilities of management in order to oversee the operational performance of complexengineering driven enterprises.