CEO Thinks: Which is better: Two Average Employees or One Driven Employee?

You are thinking of course One Driven and Motivated employee is better than two average employees, its a no brainer.

But what you are not realizing is that when you say this,you are disregarding the fact that those two employees work for you and letting them go is not an easy proposition because even though they are average, they still fulfill their job functions and do the job they are hired for. So, how can you let them go?

Consider the following example:

You have two employees performing two different job functions:

Employee A: He performs an average job, non motivated but keeps the status-quo. He is not passionate about what he is doing but fulfills his assigned duties, nothing less, nothing more. He doesn't show any interest if there is other areas he wants to move or is passionate about. He is your 9 thru 5 ideal employee.

Employee B: He also performs an average job at his current position, not motivated about what he is doing and fulfills his job duties to a satisfactory level. BUT he is very passionate about another business area, the job functions currently performed by Employee A.
During his free time, outside the company, Employee B does reads a lot about the topics related to Employee A's job functionality, he performs those activities outside work and is clearly very good at it. He is passionate about the work, loves it and would be very good at it.

Now, the question is, should CEO keep both Employee's at their current positions and let them perform Average work OR should the CEO get rid of Employee A, who clearly is unmotivated and will not go the extra mile for the company and move Employee B to his position, who will perform exceptionally because he loves it.

What do you think?