In writing creative nonfiction, generative writing and drafting are similar in which way?

There's no wrong or right way to write them all. creative writing is just for fun and there are no ends to what you can write about. Nonfiction - doesn't have to be real so you can have fun with it. generative writing and drafting are exactly what it says, drafting so it's not final. 
I hope this is what you were looking for. I hope this helps.