Huh I thought I looked this up earlier, but I guess I was mistaken. Are these zones similar to China's? I see lots of tiny zones on that list that are focused on manufacturing just one product rather than huge cities that make everything.
They are not even remotely comparable to China's. There are some SEZ's that made up of just a couple of buildings. And they aren't limited to manufacturing, it's common for multinational companies to run their R&D out of them.
Source: Worked in a Bangalore SEZ for a large Chinese telecom company.