I am using TWM - Tiling Window Manager to put windows side by side properly when comparing things like that. I am using that all the time. Need to fix the shortcuts because I have to mouse around a bit too much at the moment.
I was thinking of adding windows sizing and placement icons in SystemWindow top bar. In fact I want to have a kind of SystemWindow title bar plugin system for adding all kinds of stuff there.
And then an optional bottom bar and maybe side bars... I somewhat managed to get the concept working in a prototype and realized there is quite some stuff to refactor to get things clean. Maybe this will be a feature for TWM on Pharo6.
Phil