In my opinion it is much easier to compare different cantilevers on MM or MI cartridge inserts. In this situation the generator is the same, the difference is only a cantilever (sometimes stylus profile too). This is the reason why i like manufacturers who gave their customers almost all types of cantilevers to choose. Grace gave that option for advanced models, so anyone can try Aluminum, Beryllium, Boron, Sapphire, Ruby and even Ceramic cantilevers on the same cartridge. I think this is such a great option for curious people.
The situation is different with MC cartridges, but in addition to @nandric post above i would like to remind everyone that modern Miyajima MC cartridges are all comes with Aluminum cantilevers, even an exotic Madake cantilever is a mix of aluminum pipe and rare bamboo. The Miyajima-San claimed that his choice of cantilever material is based on actual sound of his cartridges and different cantilevers does not improved the sound. You will not find any Boron in Miyajima cartridges. I think the goal is patented Cross-Ring method which makes those cartridges so unique and highly regarded. Cartridge designeds mentioned by Nandric are all retired or dead, but Miyajima-San is alive and still making outstanding LOMC cartridges with Aluminum cantilever.
The situation is different with MC cartridges, but in addition to @nandric post above i would like to remind everyone that modern Miyajima MC cartridges are all comes with Aluminum cantilevers, even an exotic Madake cantilever is a mix of aluminum pipe and rare bamboo. The Miyajima-San claimed that his choice of cantilever material is based on actual sound of his cartridges and different cantilevers does not improved the sound. You will not find any Boron in Miyajima cartridges. I think the goal is patented Cross-Ring method which makes those cartridges so unique and highly regarded. Cartridge designeds mentioned by Nandric are all retired or dead, but Miyajima-San is alive and still making outstanding LOMC cartridges with Aluminum cantilever.