Guitarist post!  My friend Stephen owns a silver Klon Centaur.  I just picked up the Klon KTR.  When matching the same knob settings, the Centaur was a little more relaxed and smoother.  If we closed our eyes and just tried to match the same sonic settings, we were able to achieve a sound that is indiscernable.  Verdict. . . . KTR is awesome!