well, if i researched correctly, the pegasus is a steadycam-type of stabiliser. But a gyroscope stab. is a different category...its active stab, for situations where the pegasus would never work (on a car, a boat, a plane or helicopter, a jib\crane, etc..) its for a different use that the pegasus style.
@Vitaliy_Kiselev do you know if is there any chance of being able to buy just their 'front-and-back' camera head unit? I like the 'memory markings' on the pegasus :-)