My three NVIDIA cards are more power efficient than my one AMD card, both at idle and during usage.
Official ROCm is like pulling teeth with poor support for desktop cards. Debian, a volunteer led project, have better ROCm CI than AMD and support more cards.
Look at any benchmarks. NV midrange cards are faster than AMD and at least a generation in front. Owning a 7900XTX is an embarrassing disappointment.
I like AMD and want them to succeed, but they are way behind NV in this area.