Certificate-Specific Questions - What's the difference between "Foundations of Agile Project Management" and the full "Project Management" certificate?

What's the difference between "Foundations of Agile Project Management" and the full "Project Management" certificate?

• Foundations (Degree Plus): 3 courses, 12 units, FREE
• Full PM Certificate: 4 courses, 16 units, $1,200+

The Foundations version was designed specifically for undergraduates. After completing Degree Plus, you can return to complete the full certificate (paying only for the remaining course).