Those RAM usage comparisons should consider the shared memory among those processes. Aren't those renderer and zygote processes forks of each other?

I don't think that tools like htop or Process Explorer give us an easy at-a-glance answer to how much RAM multi-process browsers or Electron apps need. My current approach is to monitor the currently free RAM while at the same time closing the entire application. That delta at that moment is a more accurate representation of the app's memory consumption than summing up RSS values or working sets.