I just played back some night video from a few days ago and compared it to last night after I made the settings changes and there is noticeably more motion blur. It's not horrible but more than I would like. I will have to see if I can find a balance between motion blur and noise. It's that or swap the 2032 for turrets that don't have the noise issue.
Yeah, as others have stated (and obviously you've learned yourself from experience), the 1/6 isn't going to work if you're trying to identify moving people or vehicles....The lower gain setting will reduce noise without the blurring effect, but will also darken the image, so you have to be careful with lowering it too much.
Lowering the Sharpness setting will also reduce the noise some, but that's because it blurs the pixels together...Lower it too much and you may make the license plates too blurry to read.
It really is a trial and error situation. There's lots of options to correct problems (such as low light, noise, ect.), but most of the time improving one thing will come at the expense of degrading other things....You run into this issue with photography in general. Reduce shutter speed, you improve low light situations at the cost of blurring motion; raise it and you decrease motion blur while darkening the picture...Open the aperture wider, you improve low light situations at the cost of messing up your depth of field....Raise the ISO and you brighten the image at the cost of adding noise/grain to the image. It's a matter of determining what you can afford to sacrifice in order to find out what you can adjust to improve the things you can't sacrifice on....and when it comes to these budget security cams, your options are even more limited from professional photography cams (for example, the Hikvision bullets won't allow you to adjust aperture size, etc..)
The best solution both with budget security cams and professional photography equipment is to get the best ambient scene before it reaches the camera's sensor, rather than letting an image with strong limitations enter the camera and expecting the camera to compensate.....That is to say, it's better to have enough physical light in your scene rather than giving the camera a dark image and expecting it to compensate by altering the shutter speed, etc.
The Turret has a stronger IR light, so it's always going to give a better image in low light situations, because it's IR light is proving more Infrared lighting to it's surroundings. Getting a stronger ambient or infrared light and shining it onto the bullet cams scene will make it produce less noise without the adverse effects of blurring.
The key is improving the lighting conditions outside of the camera as much as possible first, then only use the camera's settings to compensate for the things you absolutely cannot control in the environment.