Cos, you should know by now, that most magazine reviewers will say a lower cost unit sound bright, just to different degrees. Conversely expensive units will sound warm, huge soundstage etc. They have to say that sort of things, just like high end dealer sales reps have to tell us their more expensive product lines sound hugely better than their less expensive product lines. The same applies to not just amps but any audio products including cables.
Other than that, amps don't sound the same, but most class AB amps beyond the entry level should sound almost the same to humans, but of course not to other creatures that can detect level of difference not detectable by most people.
