As the announcers compares the combatants, it claims Amuro Ray's age as 29, his age in Mobile Suit Gundam: Char's Counterattack (1988), thus he would had piloted the RX-93 Nu Gundam. His age in Kidô Senshi Gundam (1979) would had been age 15 (or 16 by the end of the One Year War).
The RX-78 impales Optimus Prime with it's beam saber yet it manages to recover to pull it off unlike in Kidô Senshi Gundam (1979), which was used to destroy warships and the biggest of mobile armors.