If you're doing an apples to apples comparison of Axis cameras to Dahua cameras with the same image sensor size (4K 1/1.2, 4mp 1/1.8, 2mp 2/2.8 etc.) the low light sensitivity is going to be very similar. Where Axis cameras pull ahead in image quality is the image processing. The WDR and the ability for the camera to handle very difficult lighting conditions (direct sunlight, uneven sunlight in a scene, camera inside of a building facing a glass entryway that views a parking lot with bright sun etc.) and still be able to provide a clear image of someone's face is the best I've seen compared to other cameras I've used. In addition, Axis cameras handle night scenes really well regardless if its in full color (as long as you have enough light) or IR. I never have to worry about an overexposed face because of the IR or a powerful LED light. I replaced my Dahua Color 4K-T in my driveway with an Axis P1468-LE. I have a 60 watt LED light in my driveway and I had to do a lot of tuning with the 4K-T to counteract the bright LED light so my face wasn't washed out. The settings in the camera were specific to having my driveway light on, so if the light was off, I wouldn't have an image that I liked. Even with the settings I had, it still wasn't perfect. With the P1468-LE, I barely changed any settings and I have a really good image both day and night. My face was never overexposed and due to the image processing, I was also able to read license plates at night while running in full color (With a vehicle pulling into my driveway traveling at a really slow speed or stopped, it was not setup for LPR). I was not able to do that with my 4K-T.
Axis also offers varifocal bullet and dome 4K cameras with a 1/1.2 image sensor and IR where the Dahua 4K cameras with a 1/1.2 image sensor only come in full color and a fixed lens (except for some of their PTZ's). They also suffer from close focus distance limitations where the Axis cameras don't have that limitation (Unless the newer 4K-T's have changed that but I'm not aware of any new versions).
I've posted day/night video examples of the P1468-LE and Q3538-LVE (front door camera) on other treads. I'll make a thread in the Axis forum soon and post them in one spot so it's easier to find.
I also purchased the Axis Q6315-LE PTZ and a Radar unit that I've been testing and will make a post about soon. However, Axis just announced a refresh of the Q63 PTZ's that will be released Q2 of this year so the Q6315-LE will be replaced with the Q6355-LE (Has the newest SoC with better AI and AV1 video codec).
Axis is also releasing new P32 domes and Q35 domes so my Q3538-LVE will also be replaced with a newer model and a Dual-sensor camera (AXIS P1518-LE) with a 4K 1/1.2 overview camera and a 2mp 1/2.8 camera with optical zoom.
Dual-sensor box camera offers wide-angle and close-up views of the same scene