The key differences are:
Maslow can be broken up into 5 stages (Physiological, Safety, Social, Esteem, Self Actualization), which state that individuals have ascending sets of needs which motivates them. It is the HR Managers role to analyse what particular stage each employee is at and ensure their needs are being met to ensure motivation levels remain high. For instance, if the employee is at the third stage, a weekend of team building may increase morale/promote personal acceptance.
Locke's theory in comparison, is based upon specific, clear goal setting and good feedback as a catalyst for motivation. Managers should be clear about objectives before pursuing them, they shouldn't be too challenging, but at the same time not repetitive/boring.
Seven steps in setting goals (remember, specific and clear)
1. Specify objective.
2. Specify how it will be measured.
3. Set standards.
4. Set deadline.
5. Prioritise goals.
6. Rate goals for difficulty and importance.
7. Determine coordination requirements with others.