Having a debate with an Italian guy about who is the bigger club and I think it’s close.
Both have won their domestic league 19 times and Milan have 1 more Champions League.
Milan probably have more well known legends like Van Basten, Kaka, Maldini, Gullit and Pirlo. But in recent years Liverpool have had Gerrard, Suarez, Alonso, VVD and Salah.
The current popularity of the Premier League helps Liverpool but Milan also has a huge fanbase.
ajax easily goes there, at the very top, you could easily make a case for them being a bigger club than barcelona. Barcelona didnt have an european cup until 1992, when ajax had 3, and they were one of the best teams in european history