I used to own the Kontrapunkt "c" and later owned 2 Cadenza Bronzes. I still have a Bronze. I share many of your feelings -- the Kontra seemed a bit more fun and satisfyingly musical somehow. The Bronze offers a slightly more restrained and "proper" audiophile sound. That said, their design is highly congruent (Bronze directly supersedes "c") and they still share 90%+ the same flavor of sound which you will not find in other cartridge models! This is due to sharing the same generator motor design and (IMO crucially) the tapered aluminum pipe cantilever.
What’s changed in Bronze is the Replicant vs. FG80 stylus, aluminum vs. plastic inner structure, and Acurum (gold plated copper) vs. pure silver coil wire (Kontra). I suppose there could be other minor changes that might not be documented. Hard to say what is most impactful of the listed changes, but I’d suspect the silver coil wire and plastic inner body might be more important players than the stylus?
Anyways, you can perhaps tilt the Bronze a little more into "fun" territory with phono stage matches. It’s an excellent cartridge in its own right, and remains one of my favorites. I’m listening to it on a high-end Stax setup right now! But certainly, I regret selling my Kontra "c" many years ago (it had a LOT of life left). Wish like anything I’d kept it. I still look out for one on the used market, occasionally.
In short, I would NOT seek out a retip on the Bronze to try and make it sound more like the Kontra "c". It’s kind of its own thing for a few reasons, and retipping that cantilever seems like it might degrade its integrity.
I also owned Kontra "a", a very nice little cart in its own right but man the "c" was way better. Cadenza Red is its successor, and I’d say in that case the Red is a clear improvement. That said, I think the Kontra "a" started out listing for $600 or $700, and wow that would be a stellar option if available today!