This powered armor is composed of lightweight metal alloys, reinforced with ceramic castings at key points. The motion-assist servo-motors appear to be high quality model as well. Unlike leather and metal armors, which cannot be used by ghouls, both modification of power armor are suitable for ghouls as well.
The existence of this armor is quite inconsistent with the fact that even the Brotherhood proper was not able to manufacture new power armors, not to mention these advanced versions, constructed by the Enclave many years later.
"I would redo the sprite of the power armor to make it more retro. Not that there is anything technically wrong with the sprite, it's a great piece of art. It's just that it is a bit out of place in the Fallout Universe. But bear in mind that we had to design it over a year ago and Interplay approved everything we did." – Tony Oakden, producer of FOT (Freelancer interview)