GUI Emacs on a 12 year old processor (i5-4590) feels faster than on a M4 Pro Macbook. I think it's just something to do with the window manager on each of the systems (my experience is mostly with Wayland KDE) rather than the speed of the CPU.
I also run GUI Emacs on both Linux and macOS. I build it on Linux with --with-x-toolkit=lucid and for $REASONS I'm still on X11. I run it in a full-screen frame on its own monitor, and it does indeed feel faster.
