No, laid back or in your face has more to do with speakers and the arrival time of the sound. Like I commented that my 3B SST2 on the center channel was too forward compared to the 3B SST. I could have adjusted the SP2 speaker distances to compensate, but I had no intention of keeping it for my center channel amp so didn't tweak the settings. 
The SST2 was perceived as forward because the bass had more vibe and I didn't want that much bass coming from the center being that I sit close to the speaker.
Ummm, not quite. In your specific case you would be correct, but if the amplifiers were not auditioned on the same speaker in the same room, and someone acribes differences in the sound that would be a poor evaluation, and nobody here does that!
But if the same speaker / room is used, then the sonic differences are solely between the amplifiers, hence something, somewhere, somehow,in the amplification chain must be coloring the sound.