Well the Lorex cameras you have are not domes, they are turrets. They are 8MP on the 1/2.8" sensor. The 2MP on the same 1/2.8" sensor will kick it's butt all night long. That 8MP will need 4 times the light than the 2MP at night. You would be surprised how much light these little sensors need.
The 5442 series camera is on a much larger 1/1.8" sensor and is 4MP. Or you go to the king of 8MP that is on the 1/1.2" sensor. But it will cost more.
8MP on the 1/2.8" sensor is made and sold to appeal to the unknowing consumer chasing MP over quality. As such, the sensor is poor, the CPU is poor, probably plastic casing, probably not AI, etc.
These cameras are not on the ideal MP/sensor ratio...
It is simple LOL do not chase MP - do not buy a 4MP camera that is anything smaller than a 1/1.8" sensor. Do not buy a 2MP camera that is anything smaller than a 1/2.8" sensor. Do not buy a 4K (8MP) camera on anything smaller than a 1/1.2" sensor. Unfortunately, most 4k cams are on the same sensor as a 2MP and thus the 2MP will kick its butt all night long as the 4k will need 4 times the light than the 2MP... 4k will do very poor at night unless you have stadium quality lighting (well a lot of lighting LOL). Starlight, ColorVu, Full Color, etc. are simply marketing terms, so don't be sold on those names.
My neighbor was bragging to me how he only needed his four 4k cams (Lorex on the 1/2.8" sensor like yours) to see his entire property and the street and his whole backyard. His car was sitting in the driveway practically touching the garage door and his video quality was useless to ID the perp not even 10 feet away. Meanwhile my 2MP varifocal optically zoomed in to the public sidewalk provided the money shot to the police to get my neighbors all their stuff back. Nobody else had video that could provide anything useful, other than what time this motion blur ghost was at their car.
My neighbor ended up replacing several of his Lorex 4K cameras with the 2MP cameras I have since he saw how much better they performed.