Both are major port cities in South Asia with good contribution to their national economies.
Chittagong has a rich history, being the economic center of Bengal for centuries. The harbor of Chittagong was well known to the Europeans and was mentioned as one of the finest harbors in the East by Ptolemy . In the 16th century, Portuguese arrived in the city and named it as 'Porto Grand de Bengala' or the great port of Bengal. Chittagong is now regarded as the commercial capital of Bangladesh. Economy of Chittagong is mainly dominated by steel, ship building, textile etc.
Kolkata's establishment as a major city dates back to the 17th century with the arrival of the British Empire in India. Kolkata was the capital of British India and was the wealthiest city in the sub continent till the early 20th century. At present, Kolkata plays a prominent role in the economy of Eastern India. Kolkata's economy is largely led by the growth of the IT industry.
GDP (ppp)
Chittagong - $174.06 Billion
Economy of Chittagong - Wikipedia, the free encyclopedia
Kolkata - $150 Billion
Economy of Kolkata - Wikipedia, the free encyclopedia
Annual port handling
Cargo handling
Chittagong - 49.917 million tons (2012-13)
Cargo Handling Statistics | Chittagong Port Authority
Kolkata - 41.386 million tons (2013-14)
Cargo Statistics-Kolkata Port Trust
Container handling
Chittagong - 1,468,713 TEUs (2012-13)
Containers Handling Statistics of Chittagong Port | Chittagong Port Authority
Kolkata - 562,020 TEUs (2013-14)
http://www.kolkataporttrust.gov.in/showfile.php?layout=2&lang=1&lid=1284
@Rain Man @Maira La @Bilal9 @bongbang @Doyalbaba and others, please share more info about these two cities.