Right Central incisor has slight attrition. Do you recommend bonding or contouring to fix my tooth?

Bonding on the incisal edge of your teeth would certainly be the most conservative way to go, however small bondings on the edge generally encounter much wear and are generally short lived.  If your wore down your natural tooth, which is stronger than bonding, then you can't expect the plastic to hold up much better.Recontouring could be done to make the edges look symmetrical, however if too much is done your front two teeth will look too short. The central incisors in a young person should be slightly longer than the adjacent lateral incisors.Saying all that, I would suggest recontouring first.  If they look too short, then consider porcelain veneers. 

Both recommendations are valid. Generally we want to be as conservative as possible in our treatment. If the attrition is on the facial surface bonding might be the best choice. If it is on the incisal edge and the incisors are long enough then recon touring might be best as bonding on the incisal edge of an incisor often doesn't last very long.

You have minimal attrition in this central incisor. A contouring procedure would be the more appropriate treatment in your case