it's as different from 1.3.6 and 1.4.4 as 1.4.4. is from 1.3.6 and what harm is there in giving it its own subsection so that it can grow? The very reason there's a 1.3.6 and a 1.4.4 section is because of the differences between those versions. it blew up after that.
But I know there's no point in saying anything further, the decision is up to you.