The difference I think is online shopping is shopping for random
stuff like a bike, a car and other things to. Online e- shopping is
shopping for electronics.
Another answer
E shopping means, shopping using an electronic devise such as a
computer rather than walking around in a mall or store. Online
shopping means shopping on the internet which a person would also
need an electron devise such as a computer to get on the internet.
E shopping is e-commerce and is basically the thing as online
shopping.