I don't see much guidance either. It appears from the brief guidance text ("Purchase a license for yourself" vs "Purchase a license for others." that "Individual" is for personal use, and "Enterprise" for use within a legal entity employing multiple individuals - but I am grasping for straws here.

Individual is if you're purchasing for yourself. (You can use it at work if you'd like).

Enterprise is if you're purchasing multiple licenses (ie. licenses for employees).