Better amplifiers have sounded better in my system and not necessarily related to power.
Latest example I went from a well regarded high powered newer amplifier to an extremely well regarded amplifier with much lower power.
The sound was more dynamic, faster like live music and for lack of a better description well knitted together,
I thought the old amp sounded great but when I put it back into my system it sounded slow, loose, less spontaneous, less life like and the bass was not as well timed to the rest of the music.
Quality not quantity.