There is technical generation difference between the two product.
JHMCS projects monochrome symbol to the visor, but Scorpion projects color symbol to the combiner(same as HUD glass, it's placed in front of the pilot's eye).
In Scorpion, you can also use the function of HMCS and NVG at the same time, but in JHMCS you can't.
Please check official websites at least.