LSA Voyager GAN 350 versus Merrill Audio Element Amps or AGD Grand Vivace and Vivace Amps

The Underwood HiFi website compares the Voyager to far more expensive Class D amps costing $32,000 to $7,500 - presumably Merrill Audio Element Amps and AGD Vivace and Grand Vivace amps.  Has anyone directly AB'ed the Voyager amp to any of the Merrill Audio Element amps or AGD Grand Vivace or Vivace amps in a system with which they are familiar?