When it comes to bending water, earth, and fire, Aang and Korra are more or less equivalent by the end of their respective shows. However, when judging airbending ability, Aang is easily the more skilled bender and thus gains an advantage over Korra.

Is Korra stronger than Aang?

Clearly, both Aang and Korra were very skilled as both fighters and Avatars, with Korra having far more natural talent as a warrior than Aang. ... Ultimately, this made Aang the more powerful of the two Avatars.

Why is Korra more powerful than Aang?

Her tendency to bend first and ask questions later made her a stronger bender. While Aang learned control and peace, Korra was constantly using her abilities, naturally fighting stronger opponents in the process. That alone would make her a stronger Avatar.