I'd never heard of the other version so I looked it up on Wikipedia and then saw this:
"It was the first and only game released for the Universal System 1, a standardized laser disc video game system. Several other games were planned for this cabinet, but were never released: Adventure in Middle Earth, Adventure Mr. Do!, Time Slip, Circus Circus, Space Dracula, and Wilderness Kingdom"
SPACE DRACULA?! That sounds awesome and ridiculous at the same time!!