Shindo lab pre amps

Has anyone heard or compared the Shindo Voshne Romanee or Masseto to better pre amps like the Art2 or 3, Lamm L2, Ref3,Vtl 7.5 or any of the better pre amps that may come to mind. I heard the Voshne at CSA audio and was very impressed but had nothing with which to compare it, but it was very musical sounding and the one of the salesmen even said tha he sold his Lamm and bought the Masseto after comparing them.