Comparison of Indian federalism with Canadian federalism?

The privy council played an important role in Canadian constitution. In due period by the process of interpretation made the center weak and raised the provinces. This was due to french majority state. On the contrary the Indian government was not a result of a compact between several sovereign units but a result of conversion of unitary system into federal-system. Here the movement is from unitary to union. From unitarism to federalism. Instead of the work 'federalism' the Word 'union' w2as deliberately selected by framers of Indian Constitution. Thus even though there are different states in India, India is a one country, a union.