I have two rules:

Avoid buying something not sold by Amazon.

Never buy something not delivered by Amazon.

At least if it’s wrong or fake you can send it back and get your monies back with no hassle.

Milan is slightly bigger since it has more Champions League wins than Liverpool, thus being more traditional and having more continental presence. You can say that Liverpool had more recent success, but recent success does not make a club big (Looking at you, Blue Manchester).

The fact that Serie A is not as big as the Premiership (this now, because the Serie A was huge in the 90’s) should not be something to consider, it’s not Milan’s choice to be on that league or not.