Larryr- My experience has indicated that SET sound is unique. There is a purity and harmonic structure to SET designs that I haven't heard in P-P. Obviously, it is much easier and efficient to make a high power P-P that can drive difficult load or relatively inefficient speakers. The usual differences are found in the weight and extension of the very low end and less compression under high spl levels. However, with the right speakers, good SET amps are a very special breed, capable of amazing dynamics and sonic realism especially in the critical midrange. Just my .02.
