I understand you're new here - Welcome. I got the information below from the Web links you posted and hi-lighted some of the spec differences. You can do that too -
its good to contribute. I"ve heard neither.
Extreme Exotics - "This truly exotic version is exclusively made for Audio Exotics, Hong Kong.
Audio Exotics is the only point of sale globally."
Cantilever and coil body: | Monobloc ceramic unit, patented design |
Coil: | Pure gold 24 carat |
Diamond shape: | Micro ridge |
Magnet unit: | Neodym-Armco, reduced eddy current loss |
Body: | Bronze-Aluminium-wood |
Connection: | 1/2" – 4pin, gold plated |
Vertical Tracking Angle: | 20° |
Weight: | 20,8g |
Tracking force: | 1,9…2,1g |
Output voltage: | 0,25mV @ 5cm/s |
Compliance: | 12µm/mN |
Bandwidth: | 20 - 30‘000Hz |
FIM disortion: | max. 0,2% |
Impedance: | 2x 20? |
Recommended load: | 400 - 800? |
Goldberg Maestro
Diamond shape | Micro Ridge |
Cantilever | Sapphire |
Structure | Bronze, ruthenium plated |
Body | Aluminium, gold plated |
Weight | 20g |
Tracking force | 2,3…2,5g |
Output voltage | 0,4mV @ 5cm/s |
Compliance | 12µm/mN |
Impedance | 7 Ohms |
Recommended load | 100…300 Ohms |