Solved. How to have more than one project open for comparison?

I would like to switch between the two project’s flows side by side so I can check my own requests against the original ones but mitmproxy only allows one instance open at a time on the same computer that I saw so far.

I have used a container to open a second instance but wondered if there is an inbuilt way to do this since it is a kind of fundamental thing to do. No biggy if not just wondered if I was missing something.

Ok I got it; use -p switch.