I have sets of both:

Sena 30k Cardo Packtalk Bold.

In my opinion the Sena 30k is terrible audio quality for music very tinny sound, no bass reproduction (not the primary purpose, but nice to have) and decent quality for communication. I had issues with being able to hear my riding partner, and issues with being able to hear while on the phone as well. I will say that the person on the other end did not have issues with hearing me (comms, or phone calls). Could have been placement of the speakers in my helmet, though I tried additional spacers and adjusting speaker placement with little to no change for myself.

Cardo Packtalk with JBL speakers is excellent quality for music (excellent given the size of the speakers, I mean they are 40mm speakers in a helmet not audiophile units) and decent quality for communication. I can say in the half dozen times I've needed to answer a phone call I could hear clearly, and the person I was talking to was unaware that I was on my bike.

In the end my wife and I use the Cardo system. More expensive than the Sena but overall we have been happy with them.

Unfortunately I do not have any experience outside the above. Comms are expensive and at some point I had to prioritize cash to other wants/needs.