The Ultimate Quadcam is vastly superior to any of the cheap plastic multi-lensed offerings from the Lomo Society. As the UQ's blurb says:
'Take one image at a time, two images at a time, four images at a time or four images sequentially at three different speeds. Includes a built-in flash with red-eye reduction, motorized advance and rewind.'
None of the Lomo cams have any extra features beyond perhaps a rudimentary flashand maybe some colour gels.
In effect with the UQ, if you choose to, you can shoot 144 seperate shots on one 36 frame roll. You cannot do that with any of the Lomo cameras, they all fire all four shutters together.