Well, diamond cantilever is just one design among others. A cartridge should be seen as one unit. When a normal one is not your cup of tea, I doubt that the same with diamond cantilever will bite the bullet.
Zyx for example had one (Sigma?) with diamond cantilever and some said, the Universe with regular cantilever beat it.
When you have 2 identical carts, one regular cantilever and the other one with diamond cantilever (Koetsu Stones for example), the one with diamond cantilever shows more details, is a bit sharper in focus and the soundstage is a bit deeper and wider. They can sound a bit more detailed overall with improved dynamics (depending on records of course).
But it will depend on your System in general I guess. For some it is not worth the money, others are happy with it.
Zyx for example had one (Sigma?) with diamond cantilever and some said, the Universe with regular cantilever beat it.
When you have 2 identical carts, one regular cantilever and the other one with diamond cantilever (Koetsu Stones for example), the one with diamond cantilever shows more details, is a bit sharper in focus and the soundstage is a bit deeper and wider. They can sound a bit more detailed overall with improved dynamics (depending on records of course).
But it will depend on your System in general I guess. For some it is not worth the money, others are happy with it.