Attached in the comment are recordings taken with the right, both, then left headphones (You have to unmute to listen on github).
As you can hear, in all recordings, the quality is fairly low. But even worse, sometimes my voice becomes unintelligible.
I conducted this test after recipients of the first two calls I had with the Jabra Elite Pro 7 said I was muffled. This was never a noticible issue on the 65t. Only confounding variable there is that I never used the "ear filling" eartip on the 65t.
Jabra.Right.ear.end.mp4
Jabra.Left.ear.mp4
Jabra.Both.ears.mp4