I don't trust any/all reviews of anything in mags/net about audio, I don't trust any manufacturer claiming anything, nothing. IMO, it really is a total snake oil industry. Speakers, cables, amps... all of it.
An amp that sounds very different from another is a broken amp, all it should do is amplify the signal, thats it. They "shouldn't" sound different and they ones that possibly do? they are broken designs.
I'm 100% with Carp and Archaea. Having had over 40 different amps counting my pro and HT version, I've yet to hear any significant difference between any of them and any level other than clipping.
I honestly do think people that hear huge differences are nuts, I completely write them off and pretty much would never take their advise on anything (sorry lol) Slight differences? Sure it's possible, I don't personally hear any, so some guy on the internet isn't going to "convince me" that they do, thats for sure. Same goes the other way.
There are certain people on AVS that I respect their info and input and would take their advice in a heartbeat, then there are others that I wouldn't take their advise on dental floss, since I think they are tools (though not many in this thread, this is a great bunch of guys and the only thread on the internet that isn't full of BS
It's a fun hobby, we all like to try out new stuff but too many people get caught up in audio. Super flat response's, graph this, graph that. Blah. It's fun to tweak but in the end, isn't it your own personal enjoyment that you really care about? I setup my system how I want it to sound, whether that means someone agrees with me or not makes no difference. How many times has someone said " thats not the way the director intended it to be heard" LOL, gimme a break, who the hell case what some director thinks, I bought the movie, and I'm gonna run my subs 15dB hot, so get outta my way, cause here comes the bass!!!