I wonder how different it has to be. If you were to switch around 2 notes in a couple phrases overall you’d probably end up with more or less the same song. I d

I wonder how different it has to be. If you were to switch around 2 notes in a couple phrases overall you’d probably end up with more or less the same song. I don’t know of anything that would do it automatically. I’m more curious about the subjectivity of what makes it different or not