At the time of independence (1947), Kolkatta was No 1 city in India in every way (population, commerce, industry etc) while Ahmedabad was not even among top 10 indian cities.
Today, Kolkatta is being compared with Ahmedabad... and even that comparision falls flat because Ahmedabad does not have the evil communism-trade unionism that Kolkatta is having.
That is a terrible fall for a city - Kolkatta which was once the Number 1 city in Asia !!