One of the main reason getting both Leader Class Optimus Prime and Leader Class JetFire is both Leader class toy can combine to form Powered-Up Prime. Contrary to the combinati0n, in the Revenge of the Fallen (ROTF) movie Powered-Up Prime is form after JetFire sacrifice himself to allow its body to beef up Optimus Prime weaponary and giving flight capability to Optimus Prime in the ROTF movie climax.

Regardless of TakaraTomy or Hasbro version of the toy, both is able to be combined without issues.