TUBE amps are in a totally different league, not saying better or worst, but different.
You compare apple-to-apple, so one diesel engine vs. another diesel engine, not diesel vs. gasoline ...
Any amp technology brings music from point A to point B, as any car engine technology brings you from point A to point B.
Each technology offers pros and cons.
Usually, you compare what's comparable ... you do not compare a road bike with a MTB ... Although both bring you from point A to point B.
I disagree. All amps are comparable - they do the same task, they can be measureud the same way, so yes, they can be compared.
Btw, although you are new to this forum it didn't take you long to make car analogy. It really seems to be the thing around here..