I recommend you start on the first page of this thread and read it through. Also search the web for online forum posts from users Neobop and Dialoum. There have been many, many posts and threads about CA MM carts and their apparent AT heritage. Quick hitters are:
It appears obvious that the cartridge bodies on all of the CA MM cartridges are AT-95e-based, whether they are stock AT95e bodies, or upgraded bodies sourced from AT. The bodies all accept standard AT95e stylus plugs, even though they are sold as user non-serviceable.
Users have reported on installing AT95e-based styli in CA cartridges. I have installed several of them in my CA Virtuoso and can attest that even a cheap .3X.7 bonded stylus sounds excellent in the Virtuoso. I'm currently running a HE stylus in my Virtuoso that sounds better than the OEM stylus.
Last, I have made a frankencart Virtuoso "clone" by potting and wood-body mounting a standard AT95e cartridge and installing a .3X.7 stylus. It sounds very good to me, close to the Virtuoso.
The real revelation in all of this, for me, was not that the CA MM carts were "lesser" because they were based on the AT95e, but instead that the AT95e is a fantastic cartridge that rarely gets installed and really heard on good turntables, and appreciated for how good it really is. It's held back, to some extent, by its .4X.7 stylus, and there are many options for stylus upgrades all the way to shibata tips for it.