Very incorrect I am afraid. Foundation is a short series and all of the books are roughly 300 pages. The books of the Dune series are all over 400 pages. Not to mention Asimov is about as exciting as watching paint dry.
I assume you're talking about books not adaptations?
btw, w.r.t the books, these are the correct answers:
Dune > Foundation (first novels of series)
Dune > Foundation series
Foundation > Dune series
Foundation series > Dune series