I much prefer FSR as it’s a more open system. DLSS only works on Nvidia because Nvidia wants it to only work on Nvidia. FSR might be a step behind tech wise but it’s improving all the time.
I think it’s easy to draw a comparison here with the G-Sync vs Freesync debate that has pretty much resulted in total victory for AMD. From my observations G-Sync clings to life in only the very highest end bleeding edge turbo gamer monitors.
More open and permissive standards hopefully win out in the end.
It’s the fact that it’s in near real time now, older techniques with older hardware would need much longer.