Netcam XL 640 vs. Netcam MP

The main differences are:

Netcam XL 640 (Image Size: 320x240) Cost: $570.00
Netcam MP (Image Size: 640x480) Cost: $650.00

What about Auto-Iris?

Netcam XL (yes and it is faster)
Netcam MP (no)

What is Auto-Iris?

The lens has a wire that plugs into the side on the camera; all you need to do is check the Auto-Iris box on the Image Tab under Advanced on your configuration page.