I don't think they're after the same thing, despite the similarities. TidyPub is pretty, readable, and, to use a term from the site, 'classy'. It's about ONE entry. One page.

Jottit is about making a website -- multiple pages, themes, etc. It's more like a quick wiki. It's certainly not as readable or pretty, but is quite utilitarian -- not a bad thing, just different.

So, despite the two both beginning the process with a simple textarea and a button, they're not the same, and neither should strive to be the other.