Good, Better, Best is subjective unless you’re putting requirements on a task, such as top speed, slalom course ect.
My thought is the reason behind it is for better ride for pot holes bumps etc. But that's just an uneducated opinion.
I did see a show once where people had to build a cycle out of junk yard parts and the one with the larger front smaller (way smaller) rear beat all others. This was an extreme example and would never be put to test in a real world setting.