Fine, but the O/P question was a valid one and it deserved a full answer. That answer, when you look at what Autel lists as functions on the 906, is the Autel will do more. Whether it is easier to read and understand is a different question.
I have no beef with Leafspy other than it is restricted to a few OS. Bang for the buck, I haven't seen anything else in that price range. That said, it doesn't as far as I know, do some of the function more advanced scanners can. If you are in the business of repairing cars, including EV's a scanner/diagnostic tool that can do more, has its advantages. Again, the O/P was not asking if he should get a Autel or Leafspy, but if he would get more abilities adding Leafspy, and from looking at what the documentation shows, the answer is no.