>>114241832I always leaned towards "Oh Yeah Cartoons!" more than "What a Cartoon".
For me, the two had a weird juxtaposition where I'm really glad the vast majority of What A Cartoon! shorts never got greenlit, but Oh Yeah Cartoons demonstrated that Nickelodeon had a chance to strike gold several times but just sat on the prospects.
So basically, Cartoon Network had better cartoons but Oh Yeah Cartoons! was higher quality.