What about diamond cantilever/stylus combo

In the so called 'MM thread' J. Carr explained the differences between cantilever materials.The advantage of aluminum cantilever being that the stylus can be pressure
fitted while by the so called 'exotic cantilevers' the stylus need to be glued in the cantilevers. There are different conditions which the cantilever need to satisfy
in order to ,uh, satisfy the preferences of an designer. J. Carr also explained why he prefers boron cantilevers. Now I own the Sony XL 88 as well as the Sony XL 88 D.
'D' referring to the cantilever and stylus made from one piece of diamond. But here is my confusion. Both carts have the same 'generator' and also the same technical specs. But 'soundwise' they are as different as an Lada and an Ferrari (by way of speaking or by exaggeration). The comparisson between French wines as well between the French chief cooks come to mind.BTW the pudding will also do. Without any technical pretenitons I would think that the only explantion for the mentioned difference should be the diamond cantilever/stylus combo. If it was possible I would gladly retip my chosen MC carts with such cantilever/ stylus combo and pay, say, $1500 for the jewel. Now if there is demand then there should be supply? The question is if there is 'interesting demand' for the possible producer(s)?

Regards,