If you are referring to the Superion kit, I was actually somewhat disappointed with it. It did improve the Gestalt considerably but it was still set back by the design flaws of the base toys. Some of the weapons also integrated poorly into the individual robot modes. As a result it is by far my least liked Fans Project kit.
This new Crossfire set improves all that as it essentially gets rid of the flaws of the base mold. You don't just get two new limbs but also parts that change the engineering of the gestalt for the better. The parts are also not just there for visual aesthetics but also integrate nicely into the individual robot modes and vehicles.
This new Crossfire is a very nice progression from the previous one.