Right away, the intro doesn't clearly explain about the factories and the collection crates for the goods.
Perhaps two sections entitled "Factories" and "Goods" would be helpful.
Factories: You can build three different factories--a hat factory, a flower factory, and an ice cream factory. Each factory requires a different number of pots of gold to build. Each factory produces a different number of goods/ manufacturing cycle. You can hire a manager for each factory, and upgrade them separately. So, the inexpensive hat factory produces very few goods, even after you upgrade the manager as much as you can. Whereas, the ice cream factory, which is the most expensive to build, produces a tremendous number of goods, even with the entry level manager.
Goods: All three factories put their goods into the same crates on the river dock, where they are picked up by the ferry and off loaded onto the dock by the festival. The goods all take up the same amount of space on the ferry and bring you the same number of shamrocks when the festival accepts them. So, once the three factories put their goods into the shipping crates. the goods become indistinguishable from one other, as far as we are concerned.