best way to reach QEMU VM desktop on headless GuixSD server

[George myglc2 Clemmer]

It appears that there are 3 ways to reach a QEMU VM desktop on headless
GuixSD servers: X11, spice, and maybe VNC. Is that right?

Can anyone comment on which has the best performance.

My situation: MacOS <-- 1000BaseT --> GuixSD/servers

TIA - George