Main has the following meanings:-
1. Most important; principal, chief: “Amitabh Bachchan is the main attraction of the quiz show Kaun Banega Crorepati.”
2. Exerted to the utmost; sheer: “Will power is the main strength of a person.”
3. The largest pipe in a system of connected pipes: “The electricity is supplied through Bakhra main line to various parts of North India .”
Mane , on the other hand, means long, heavy hair that is a characteristic observed around the necks of some mammals: “The difference between a lion and a tiger is that the former has a long, flowing mane.”