You cannot really pin them down as which is better or what's the advantage of one over another. Each have their own operating parameters and do basically the same thing in the end: amplify a signal. How they are implemented for a given topology, the skill of the designer, and overall engineering from power cord to speaker terminals will determine their perfomance. Just one cog of many in a wheel.
For example, Nelson Pass used JFET's in the Threshold "e" series, IGBT's in the Forte's and MOSFET's in the latest "X" series. All different topologies and all, IMO, one hell of a good sounding product history.
For example, Nelson Pass used JFET's in the Threshold "e" series, IGBT's in the Forte's and MOSFET's in the latest "X" series. All different topologies and all, IMO, one hell of a good sounding product history.