Thats... the point
earth 2 superman was not on PC levels. he fought evenly with kal el
Prime on the other hand strangely managed to retain his powers, moving around planets and stuff
or was suppsed to anyway before conner ( regular superboy) made him bleed
Prime was incredibly inconsistent. on one hand he was supposed to be as powerful as a PC Kryptonian , on the other , his feats didnt match up