There are some similarities between the X-droids and reaverbots other than thier eyes.
Both seem to not have any emotion.
They show little initiative of thier own only carrying out programmed directives of attacking intruders, whatever other activity they were designed for, and to do anything other than these directives they must recieve orders from an immediate superior(like an NA general, mother unit, or whatever model Juno was).
Both also presumably have a limited A.I. that allows them to carry out orders, battle strategies, to learn from an experience, and figure out how to accomplish a task that they are not given explicit instructions for.
Maybe the X-droids were the inspiration for how the Reaverbots were to operate.