Business would be easier if you only want learning, all you have to do is study the theory. Economics is a shorter course so it's easier in that regard, but there are some things you'd need to understand and some people wouldn't like that.
Economics would have a good bit of maths involved, obviously it's nothing like HL maths or anything but you would be doing calculations and graphs much more so than in business. It also has theory, more understanding based than business. Economics is a really nice subject in my opinion, but you'd want to check it out yourself and make sure you like it.