I got the new Polaris recently; my only other experience with CA is with the Lyra II, of which I LOVE the sound (very coherent, solid, massive), but cannot ever get a fit. UIEMs in general are consistently poor fits for me anyway.
The Polaris fit a lot better, but... I got the Lyra II at a significant discount, and the Polaris ended-up costing MORE as a result. In-reality, I find the Lyra II sound better to my ears.
It doesn't make the Polaris a bad IEM, but I felt somewhat disappointed...
There's definitely a familiarity to the sound, with the Polaris a little less powerful perhaps. I've not listened to the Lyra II in months due to the fit issues so I could be wrong.