I would probably predict a draw in this match even though Atalanta actually has a bigger advantage and will definitely be more favored but Milan sometimes appear surprising when facing clubs that are stronger than them for example when Milan beat Real Madrid in UCL it was an unexpected result because at that time Milan was in bad form so in this match I think both teams have the same ambition to get points and a draw is a fair result for both.
On paper Atalanta has a good advantage to be able to win this match, but they can't get it easily because AC Milan certainly won't let them lose just like that. A draw might happen in this match, I agree with that.
However, I myself predict that Atalanta will most likely be able to secure victory in this match. Because they also won't let their position get any further away from the current top of the standings. so they will try their best to be able to win, especially since this will be their home game which will be very valuable. Losing points at home will be a loss for a team.