Trouble rendering two scenes together

I am trying g to render two scenes out of the composite. In scene 2 I have a different resolution setup but this gets ignored when I render the two scenes from scene 1. Using 2 layer nodes, scenes selected, piped to an output node.

I’m not sure if you can do that. Why do the scenes have to be at different resolutions?

Blender will conform other scenes to the current (compositor) scene resolution. However if you change the render resolution by the percentage factor you can use a Scale node. Then port the scenes to a File Output node. Each frame will then render at 2 resolutions. Sadly you can’t choose the exact pixel dimensions, just the percentage.