Yes, but it's close to splitting hairs at this point, IMO.
You can roughly estimate a camera's low-light performance by using its minimum illumination lux spec (where lower is better):
0.190 lux = your existing camera
0.002 lux = Dahua's 5442 models
As you can see there, the 5442 is a huge jump in terms of low-light sensitivity.
There are 0.001 lux models out there, like the one below. They generally use the same great 4MP 1/1.8" image sensor that most of the other 5442s use, but they have a lens with a bigger aperture. I haven't seen one of these in a turret (eyeball) form yet.
https://www.dahuasecurity.com/produ...es/5-Series/Full-color/IPC-HFW5241T-ASE-NI?us
I'm just a little worried that the increased sensitivity on the newer cameras might cause an issue when looking through a glass window.