Aquadeveloper my best guess would be yes. The IR filter is there to help optimize color on the color cams. As far as I know X10 uses the same lens assembly on all of their cams so all of them have the filter, B&W included.
The ccd element in the camera's are different qualities also.
Have a few low light cameras that are so sensitive, they can see without any infrared light source when your eyes have a hard time making out the same scene.
I have some cheaper camera's that can't do what the low light camera's can do.
Of course after is gets completely dark, the low light cameras need IR light to see in total dark but they do a great job in very low light levels.
Non of my cameras have the red filter in the lens.