u/Dangerous-Job-1019

Hey guys, I'm planning on buying a Bialetti mokapot express. It is mostly to make iced americanos for me and my wife in average 300ml coffee mug sizes. I'm confused between the 4-cup or the 6- cup.

The aim is to get a strong coffee that I can add ice to and a little water as well. We both like decently strong iced coffee so don't want to make a mistake in size. What would be the best size for my situation?