I owned both PP & SET tube amps over the last almost 40 years w/ several different speakers in different rooms. There’s no hard & fast rules about any of them but the midrange detail & realism of a good SET amp is tough to beat at lower to maybe moderate volumes even w/ high sensitivity speakers. They do run out of gas quickly though when pushed at all & the distortion increases rapidly beyond their power rating or even sometimes that their rated power. They have no real “headroom “ . I have landed on PO amps for that reason as I enjoy loud volumes at times & have a big room.