More Like Bi Han's Decapitation Again Against Scorpion (Im Referring To Mythologies Cause You Had The Option To Kill Hanzo In The First Level And If You Did, You Fight Scorpion Again But You Dont Finish Him There)
They were literally the same person but with different looks noob saibot is bi han the 1st sub zero and the older brother of the 2nd sub zero kua liang but the reason why scorpion and sub zero become mortal enemies because quan chi manipulated them to figh each other so seeing the human bi han fighting quan chi is satisfying to me because killed and get restored by quan chi but quan chi altered his memories so he can become his pawn to execute the plan to restore shinnok's power sealed in his amulet
its actually bi han (same voice lines as noob saibot)... kuai liang has its own set of voice lines to show hes not the same subzero while fighting and different costume.