Right, so in the context of this discussion, tmux panes are not a good substitute for vim windows, since you wouldn't be able to copy-paste between them unless what you were copying fit in a single pane-full.
In that scenario, I would compromise by opening both files in the same Amp process and switch between them, but that's not the same as seeing both at the same time.
In that scenario, I would compromise by opening both files in the same Amp process and switch between them, but that's not the same as seeing both at the same time.