I don't own any albums from either of them but I enjoy a lot of what I've listend to. Sparks Kimono My House and Propaganda are both excellent. I like Ween's The Mollusk.
Is
The Mollusk the one with "Even If You Don't"?
I dunno. I remember seeing them on Beavis and Butt-head, may have been the video for "Daisies" and they said that Ween would have no future. Mind you, they were about ten years into a career, and that episode was a good 15 years ago, and they're still around.