Assessing any team early in the season is always inaccurate or inappropriate, as all teams still have time to make changes to achieve optimal performance in each match. However, for AC Milan and Atalanta, I think there's still very little difference in performance in the two matches they've played so far this season. However, I'm more confident in AC Milan, who will be in a much better position this season than last, even if it's not in contention for the Serie A title.
the performance is of a team that is forming, Milan has changed the game with the new coach, and we know that Allegri is not the type to be ordered around, so his game is always played, they also have to adapt to the new rules of the coach and it won't be easy for some of them
Adapting to a new coach's strategy and playing style usually takes time, so it's understandable that their performance hasn't been consistent. It will be interesting to see how Milan develops, whether they can find a stable rhythm or are hampered by the adjustment process