Satisfied employees are not necessarily engaged employees. Vice versa, engaged employees are not necessarily satisfied employees.
Satisfied employees could be happy with their paychecks, the fact that the company is close to where they live, and enjoy their colleagues’ company. Even satisfied employees could be mentally disconnected from their job, while doing the bare minimum. Meaning satisfied employees aren’t necessarily engaged with their actual job, hence less productive.
Inversely, employees who are engaged with their job could be dissatisfied with the company, their managers, and their salary.
Ideally, satisfied employees are engaged, and vice versa. Unfortunately, that’s not always the case.