But again, I am describing differences of degree. Both will give you essential SET tone. My 845 and 300B amps are the same rated power -- by virtue of the 300B amps being PSET. The midrange quality between the two is fully competitive, but the 845 sounds more dynamic and energetic, and the 300B amps have a little more ultimate resolving capability, in part influenced by the higher silver content in the 300B amps. The larger qualitative differences are in design and execution more than in the tube types.
Phil