I would have to ask for a source on that. I can’t really find anything comparing many cpus.
However this video compares top end models on otherwise pretty much identical laptops and amd definitely wins in YouTube playback on battery https://youtu.be/X_I8kPlHJ3M?si=8a4Tkmd556hQh7BZ
But if you’ve got anything to better compare I’m all ears
Ah yeah, I should have specified I was looking at the laptop side of things more as the person I originally replied to mentioned that power usage is more important there (which is understandable). There appears to be only a handful of laptop chips that I can recognize in that first link and all of them amd but I don’t know the naming scheme of modern intel laptop parts anymore.