If you really want to be an airline pilot then A320...Novelty wears off super quick, believe me!!
If you want QOL and to enjoy life and probably live at home with no commute and appreciate flying then the KA350 for sure.
I flew both and flying a King Air was far more fun and rewarding in my opinion. I fly airlines now because I have a family to support but if I got a good King Air offer with decent roster and money I would leave airlines in a heartbeat, you aint missing anything!