Autopopulate: What is the difference between Randomize and Repeating?

The Autopopulate feature has two different ways of producing autopopulated mileage log entries:
 
Randomize – Creates a log entries based on your driving habits and randomizes the number of drives and distances driven.
Example: Uber drivers, Real Estate Professionals.
 
Repeating – For those drivers who follow regular patterns of driving each day. Example: Delivery drivers who follow the same route each day.