The differences are not that big to make a difference in "learning". If your question was should I use 3 or 4, then my answer would be, depends on your project

The differences are not that big to make a difference in "learning". If your question was should I use 3 or 4, then my answer would be, depends on your project. But for learning, the version doesn't make much of a difference as the general principles are the same.