Avengers: Earth's Mightiest Heroes. Tighter writing and storytelling. Young Justice got too big and unwieldy. Way too many characters. Plus the lame timeskip.
Until the second half of the second season, where it all went to crap.
I vote Young Justice. Much more fleshed-out characters, a more interesting plot, and great action. Though it does have some characterization problems, especially in the second season, it is still exciting television.
Avengers is also pretty good. It had a great team, attractive art style, and some awesome interpretations of Marvel characters that were long overdue. However, it did start pretty weak with the mini-sodes, and again, the second half of the second season killed the momentum and promise brought upon after the Skrull arc.
Little harsh calling it racist and offensive. Stereotypical, sure.
I actually like Blue. He wanted to do anything to avoid being the Earth's downfall and that, ironically for him, ended up being his undoing. Hoping for his redemption.
Anyhow, Young Justice wins simply due to how Man of Action team ruined characters like Hank Pym and whatnot.
No it didn't. More nonsense from the "I HATE JEPH LOEB" and "MOA" crowd.
I found the cast was more fleshed out in Avengers since they had a more central cast and not a revolving cast of one million secondary and tertiary characters. They also fully establish the personal lives of many characters.
The mini-sodes were fantastic because they actually took the time to set up the main cast and conflicts that ran throughout the entire season.