The earliest authors of the codes were very clear about these motivations, in books from the time, which I do not have handy. So, take that as you will from a r

The earliest authors of the codes were very clear about these motivations, in books from the time, which I do not have handy. So, take that as you will from a random internet commenter. But I think that even without the motivations being written out, it's pretty clear in the nature of their differences.