Well, for one thing the Kerth Award is fictional
. And I was under the impression that, unlike the Pulitzer, it was only awarded for journalism (although that's a total fanwank and not based on anything we saw on the show). Plus, I don't think it was quite as prestigious as the Pulitzer: maybe like the Golden Globes are to the Oscars, or the Emmys to the Globes. Lois had multiple Kerths, but no Pulitzer.
You can find more on the Pulitzer
here (including a picture of the medal).