Yes there is. There's no point in listening to any amp that's transparent, as most are. It's transparent, so any amp that sounds different won't be, and therefore wrong.
S
Ideally an amp should put out what you put in but no one really does so because it can't.
I listened to many amps in my life but I never had the impression that even a single one has been really transparent.
According to my personal experience every amp will color the sound somewhat.
Also there have been major differences in cone control, etc. between amps.
If you don't care about actual performance you can of course skip the listening part.