I have owned both amplifiers and they sound very different indeed!
The Plinius has a dark sonic signature - considerably darker than real life, but a powerfull, fullness to its sound. The imaging floats in the middle.
The Gamut has a truer sonic signature, less of a viel between the music and listner, and a bit quicker attack of the music. The bass is fair, but not as powerfull as the plinius. The imaging is awesome - layered and detailed soundstaging - among the best in the world.
The Plinius has a dark sonic signature - considerably darker than real life, but a powerfull, fullness to its sound. The imaging floats in the middle.
The Gamut has a truer sonic signature, less of a viel between the music and listner, and a bit quicker attack of the music. The bass is fair, but not as powerfull as the plinius. The imaging is awesome - layered and detailed soundstaging - among the best in the world.