Ok this is from personal use for the last 5 months:
1. Hall effect zero drift sticks: Currently playing on a deadzone setting of 16 on one of my Dualsense controllers. Nacon was set to 1 since day 1
2. 4 Back peddles, compared to the Dualsense Edge's 2
3. Half stop triggers, faster response for FPS
4. The grips are significantly thicker that the Dualsense ... I prefer it as the rubber covers provides better grip
5. The non-symmetrical stick placements feel more natural to me
6. Programmable modes, which I like for the FPS games and testing different ingame settings with paired controller settings
7. You can reduced the travel on the sticks by using enlarger rings, short travel I prefer for FPS
So those are my personal choice reasons