Primate I would like to see that better contract, because as far as I'm aware, the contract I quoted is royalty based. Royalty contract doesn't mean you get to keep the copyright. You get 50-50 share of royalties. The fix rate is different, because they actually pay you money for the novel, no matter how much it earns. You agree a price beforehand, and all the other specifics.
For example, they will pay you $2000 for a novel that has 400 chapters. In other words they will pay you, let's say $5 for each chapter. If they earn $20 on that chapter, you will still get $5. That is what fixed rate is. Royalty means 50%, in other words if they earn $20 you get half. If they earn $5, you get half as well. In both cases, you transfer the copyright to your novel. If I'm wrong, show me the better contract.