If you intend to dine exactly as the DDP suggests (there is no wiggle room anymore) and plan to spend all your credits properly, then the DDP is going to win out. (Also, if you're going to do a shorter trip with fewer people, as you need to spend roughly $500 on food to make TiW start saving).
If you prefer TS to CS and prefer to order different from what the DDP suggests (skipping desserts, apps for entrees, non-participating restaurants, alcohol, etc), and if you plan to spend at least ~$500 (combined) on food, then TiW is going to win out.