which is easy Aeuronotical or aircraft maintenance which has higher salary
There ia no such thing called easy. You need to put efforts in both the fields.
Aircraft Maintenance is a branch of Aeronautical Engineering,in which you are taught to control, maintain and repair the specific parts of the aircraft or the entire aircraft. Aeronautical Engineering is a B.Tech degree while the latter is a three years long training programme. The salary entirely depends on the airlines one works under.
Hope this helps.
Good luck.