Chanakya is not just an organizational genius. You may be
surprised to know that he was responsible for all of Nanda Dynasty
and also was responsible for being an obstacle to Alexander's
march. He is a king maker and got two kings of Maurya dynasty rule
the larger part of India then known as Magadh.
I understand Sun Tzu on the contrary is War General, (I stand
corrected if this is not so)
Chanakya has written a lot of about accountancy and wealth
management and investmet policies which Sun Tzu has not
attempted.
Singapore government looks more like following Chanakya tactics
than Sun Tzu as they avoid war and use shrewd business tactics to
get things going for the nation.
Hope this helps.