>>95450859>Who wins, Goku or Vegeta?
Let's be honest here, that's what you're asking.
Korra can take more hits, she can metalbend, and she's got more muscle power. However, that's it.
Aang actually mastered all the elements including airbending, while I'm not sure Korra actually worked out the kinks in her airbending. He has a stronger avatar state, he's a better defensive AND offensive bender, while Korra merely enjoys fighting more she's not actually that great at it compared to Aang.
This is slightly cruel on Korra, as most bending power comes from spiritualism, empathy, and inner understanding, items which Korra keeps grasping and letting go of, like an extremely bouncy bar of soap.
Aang overcame the loss of his entire civilisation, he unlocked all of his chakras twice, he's reluctant to fight or to kill, and believes in everyone. He's got the pacificist multiplier right up to the limit.
That being said, Korra could potentially become far stronger than Aang. Knowing how this universe works, if she stops icing random street thugs and reconnects to her past lives, that should be enough of a shove to give her better odds.