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human
[Dc comics] Are all kryptonian heroes holding back like Superman?

I still remember that Episode in the Justice league cartoon where Superman finally let loose against Darkseid and was whooping his ass, not even allowing Darkseid to counter attack. One blow and Superman sent him flying with a blow that even had the ground breaking up and nearby windows shattering. 

Is every other Kryptonian hero, Supergirl, Power Girl, Superboy, (Krypto the superdog?😏) holding back like Superman or is Superman the only one who is *really* holding back? If Superman stopped holding back against every powerful villain he faced from the be start would he defeat them easily or quickly or would he end up actually just killing them with a simple Overpowered punch/blow?
gpt
Supergirl: Is holding back, but isn't as good at it due to less practice.  Because of this, her average output is actually higher than his.  
  
Powergirl:Yes holding back like he is, and has near as much experience.  
  
Superboy: Holds back agaisnt squishy humans, but not much in general.  He is only half kryptonian so his peak output is much lower.  
  
Krypto: Intelligence level varies by continuity.  In ones where he is smart enough to hold back he generally is.  In others, you can just assume his peak output is lower.