Yes. The 9X has thrust vectoring, different fins, much better seeker (it should be extremely hard to defeat with countermeasures, if not impossible in some circumstances, idk how ED will simulate it), expanded seeker FOV, expanded WEZ, etc.
If the radar was finished I'd say it'd be a total gamechanger, but right now with the ACM modes not really working...IDK. It's gonna be a mean missile though with or without JHMCS.