If the so called "superior" parts used in a design have no improved sonic value compared to less expensive parts as deemed by the listening panel of an audio manufacturer, then I would have to say no.
Also, keep in mind that the circuit design of an amp or preamp is perhaps, a more important factor in determining how a product will sound than using "superior" parts.
Also, keep in mind that the circuit design of an amp or preamp is perhaps, a more important factor in determining how a product will sound than using "superior" parts.