John Deere Tractor comparison chart provided by Mutton Power Equipment of Fort Wayne Indiana
John Deere Sub-Compact Utility Tractors:

The Sub Compact tractor is designed to be an affordable utility tractor for homeowners looking to do more than just mow.
Their small size limits the amount of space needed to store and also make them easier to get on and off. Although these tractor can handle almost any attachment in the book, they do have their limits.
John Deere Compact Utility Tractors:
Compact utility tractors are built to handle heavier work loads for large property owners, construction sites, municipalities, and hobby farmers.
They are offered in small, medium, or large frames to fit the desired attachment sizes. These tractors are typically used to do more ground engaging activity such as digging and pushing. Along with more capability these tractors have more options to assist in different terrains and work conditions.
John Deere Utility Tractors:
Primarily used by farmers, municipalities and constructions sites, John Deere tractors are built to handle the most grueling tasks on the property.
There full size frames make these tractors heavy enough to move piles of earth and power a number of larger farm implements. Available with a number of advanced features, these John Deere tractors have what it takes to make any task as simple as pushing buttons.