Superboy is very strong but not being a full Kryptonian means he just doesn't have the same level of strength as Supergirl. This isn't usually a problem, but against Supergirl? Yeah, it's not going to end well. Supergirl is a lot stronger than Superboy and there are no two ways about it.
It's clear she absorbs her solar powers even faster than Superman. Beyond that, Supergirl just doesn't hold back. Honestly, Superman is not as strong even when he doesn't hold back. In DC Comics' 2021 series Crime Syndicate, we see Earth-3 Kal-El become the evil Ultraman.
Superboy, much like Superman, has a weakness towards magic. However, even without using her magical abilities, Scarlet Witch could still defeat Superboy. Scarlet Witch's power is so great that she has been able to change the world... literally.
Supergirl is incredibly strong, and possess all the powers of her more famous cousin. Unfortunately, she lacks the experience and training necessary to defeat Diana in a fight. Supergirl has more powers, but Wonder Woman's sheer strength and battle-hardened skill allow her to triumph over the last daughter of Krypton.
Ending the Debate: Why Superman is Definitively More Powerful Than Supergirl
Who is the strongest female DC character?
1 Wonder Woman
When considering her powers, she still bests all other female superheroes; not because of physical abilities, but because of her sheer will and determination. Wonder Woman knows no defeat, and she'll keep on fighting until the end, and even against more powerful enemies like Darkseid.
Superhuman Strength: The exact magnitude of Supergirl's strength is unknown, but effortlessly ranges into the multi-megaton level at the very least. While the exact magnitude is unknown, it is generally accepted that it easily surpasses the capacity to lift 20,000,000,000 tons.
Black Adam's Magic Is No Use Against Superboy-Prime
In fact, he's also shown that he can't be harmed by New Earth's kryptonite, so it stands to reason that another world's magic can't hurt him either. But with Superman's power level and an invincibility to magic, Superboy-Prime eclipses Black Adam in power.
While fighting a reanimated zombie Deathstroke, Superboy is somehow stabbed and seriously injured, something the other Titans didn't think was possible. Though he survives the ordeal, the episode ends with Superboy vomiting up a blood snake, which he chooses to hide from everyone else.
Although Superboy was vulnerable to Kryptonite and magic, he was immune to the effects of a creature called "The Four-Armed Terror" which Superman was highly allergic to. Another advantage of Superboy's telekinesis is that it does not use up his solar energy as fast as Superman's powers.
Whereas most versions of Superman have a weakness to magic, Superboy-Prime has a greater resistance to it; he was able to easily fight off Black Adam during their initial encounter, and was only defeated by Shazam and Black Adam in the DC Rebirth when both of them attacked him by saying their word simultaneously, ...
Superboy is extremely powerful and would have no issue disposing of Spider-Man, webbing be damned. Kon-El's abilities include superhuman strength, durability, speed, and agility. He's also got heat vision, freeze breath, can fly, and is practically invulnerable.
While many underestimate her and consider Kara to be a softer hero than Superman, her nature shows pure, unbridled determination and stubbornness — feats she overtakes her cousin in. With her persistence, she's able to push past any limits placed that hinder Kal-El, even going so far as to beat their own natural enemy.
Why do people say Supergirl is stronger than Superman?
For a time during the Pre-Flashpoint period some believed she was stronger than Superman. Mainly because her ship had been equipped with yellow solar energy emitters. And given she spent over three decades in stasis exposed to that energy, it led some like Batman to theorize she might be more powerful than Superman.
Out of all the Kryptonians in the DC Universe, Supergirl is surprisingly the strongest of them all. A villain reveals that Kara has a mythical aspect to her powers that make her far more powerful than her cousin, Superman.
Even though Superman is often considered the most powerful character in the DC Universe, Shazam definitely comes close, and he can even beat the Man of Steel. And with a massive power upgrade, there's no question that Shazam can meet Superman blow for blow—despite the upgrade's terrible side effects.
Superman also has a set of abilities he can use that Black Adam doesn't have: X-ray vision, heat vision, super breath and super hearing. He's grown up with these abilities, so they are second nature to him, making them strategic wild cards in a fight between the two.
Superman doesn't beat Darkseid because of how powerful he is; while that helps him survive the fight, Darkseid still outclasses Superman. Superman has learned to use his brains in battle against Darkseid, allowing him to win his battles against the dark god.
According to Batman, Jon's mixed biology could have the potential of him becoming more powerful than his father, Superman. He is shown to have developed: heat vision in Superman vol. 4 #1, X-ray vision in Trinity vol. 2 #1, freezing breath in Superman vol.
In which case, Jon is more powerful than Connor in terms of raw innate power. As a kid, he has been shown to be able to hurt Superman (when Manchester Black was controlling Jon) but this does not mean he'd win against Conner, even as a teen.
Certainly, without its magic enchantment, both Superman and Supergirl would be able to physically lift Mjolnir… both Kryptonians have either picked up, or moved, much heavier objects!
This is because, like all Kryptonians, Supergirl and Superman receive the bulk of their powers by absorbing solar radiation from a yellow sun (or blue sun in some cases). This radiation gets metabolized by Kryptonians in such a way that their senses, speed, durability, and physical strength all becomes enhanced.
This difference in gravity allows Superman to lift objects that measure in the tons. In fact, the comics have put Superman's strength at a point where he's able to lift around 2 billion tons! To put that into perspective, the Empire State Building is only 365,000 tons!
