Vudoku (Daily Sudoku League #73)

While solving Classic Sudoku online at some of the websites I realized that many of the times symmetrical nature of the Sudoku helps you to proceed to solve the puzzle e.g. one can solve one block and then can start looking solving another symmetrical block which most of the times follows the same logical steps. In this Vudoku I am trying to break the symmetrical pattern of Sudoku. In this Sudoku hints given will help you to logically proceed to solve this puzzle.
Vudoku puzzle type appeared in Indian Sudoku Championship 2013 and I created this puzzle for the practice of that championship and posting this Sudoku as my 73rd contribution for The League of Extraordinary Ladies and Gentlemen. Can you solve this interesting Sudoku puzzle?

Rules of Vudoku

Classic Sudoku Rules apply. Additionally, the digit at the vertex of each marked V must either be the sum or difference of the other two digits on the V.