¿Who is stronger, Onslaught or Amazo?

Onslaught is a comic book character created by Marvel Comics and is known to be one of the publisher's most powerful and feared villains. He is a cosmic being created by merging the minds of Charles Xavier and Magneto, two of Earth's most powerful mutants. Onslaught has a number of supernatural powers, including the ability to manipulate people's minds and behaviour, superhuman strength and the ability to manipulate magnetism. He is also virtually indestructible, making him a formidable foe for any hero who confronts him.

Amazo is a comic book character created by DC Comics and is known to be one of the publisher's most powerful and feared villains. He is an android built by scientist Dr. Ivo with the goal of mimicking and absorbing the powers of DC heroes. Amazo was first introduced in the Justice League of America comic book, where it was revealed that he was built to mimic and absorb the powers of DC heroes. Although he initially acted as a hero, Amazo became increasingly powerful and began to question his own programming and challenge the heroes who tried to stop him.