As a hunter, often the quest is more that just putting meat on the table. Trophy quality hunting means seeking the biggest set of antlers available. Scoring deer antlers involves a number of measurements including length, spread and girth of the antlers. Because of the differences in antler structure between Whitetail and Mule Deer, the scoring methods differ.
As well, there are different scores for typical and non-typical antlers. See the diagrams below for more information.
The recognized experts in scoring big game trophies in North America is Boone and Crocket. All the scoring charts below are from boone-crockett.org/online-scoring-calculator.

Typical Whitetail Deer Antler Scoring

Non-Typical Whitetail Deer Antler Scoring

Typical Mule Deer Antler Scoring

Non-Typical Mule Deer Antler Scoring