compare:
Your car is bigger than my car.
Your car is bigger than mine.
(identical sentences)
The resale value of your car is greater than the resale value of my car.
The resale value of your car is greater than the resale value of mine.
The resale value of your car is greater than that of my car.
The resale value of your car is greater than that of mine.
(all identical)
there you go. the analogy should be clear.