It’s only a different type of high speed transistor , GAN there is far more to it then that in the design ,it’s a good selling point ,plan on spending over $4k or more
less then 25% of the actual cost goes into the build . I owned a Audio dealership
and know from speaking with engineers ,I have seen Wild claims of 10 x mark up
possibly with some brand Audio clables , but not normally with Electronics
4-1 ratio is a average ,but not set in store.