Edge Difference Sudoku (Fun With Sudoku #150)

I have been on travel for almost one month. Traveling from Bangalore (South of India) to my native place Sangrur in Punjab (North of India) and then visiting the different places esp. holy places like visiting the Golden Temple in Amritsar and Takht Sri Keshgarh Sahib along with visiting Virasat-E-Khalsa in Anandpur Sahib. Virasat-E-Khalsa is such a wonderful place. I wonder why it is still now not part of Wonder of India? Also visiting the India-Pakistan border and watching the Beating Retreat ceremony at the Wagah border was one of the most memorable moments of my life. Also, I cannot forget watching Bhakra Dam holding 9.34 billion cubic meters of water. 
Due to intense traveling and not having good excess to the internet I could not post the daily puzzles on this blog. Anyway, now I am back in Bangalore and back in action, and will be posting at least one puzzle or Sudoku every day on this blog.
Coming to today's puzzle Edge Difference Sudoku is the puzzle type that I created around a year back and this is the third puzzle of this type that I am posting now. Do try to solve other puzzles of this type if you liked this Sudoku variation.
Moreover, this Edge Difference Sudoku is the 150th Sudoku in the Fun With Sudoku Series which is one of the milestones which I have aimed for. Now looking forward to posting the 200th Sudoku in this series.

Rules of Edge Difference Sudoku

Edge Difference Sudoku (Fun With Sudoku #150)
Edge Difference Sudoku (Fun With Sudoku #150)

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