Thanks! Just tested them all. Now I've got what You said.
The positive thing it's my ears are not so wasted as I thought.
I hear the differeces between A vs C and B vs D.
it's not huge but if you pay attention you can clearly hear it.
there's a 'ghzzz' fading out in the ''Grainy'' versions.
the negative one is that this thing is making me crazy:
Manual says: ''To achieve a power amp tube character, try setting “Tube Shape” to around 9''
and You said that increasing ''Tube shape'' value makes the profiles more authentic, but the original ''Amp'' object of profiles is not a Tube powered amp.
at first Manual makes me think to a Smoother behave increasing the tube shape value, but just after that it says ''Power amp tubes produce a much harder distortion, because the negative feedback in the power amp circuit linearizes the tube amplification, making the distortion curve edgier''
it's a bit confusing..
Anyway, I will pay more attention to details like this next time I will profile. thanks!