We decided on Odyssey over Sienna for the following reasons: 1. higher crash ratings for the front passenger; 2. usable middle seat in the second row; 3. more space in the third row; 4. the economy mode (3 or 4 cylinders) for the engine.
No mater what they say, coming from Toyota Camry, the road noise is definitely noticeable at high way speeds. I feel more comfortable with Toyotas power train. Odysseys transmission on some occasion downshifts rough. Brakes are soft. For leather interior you get maybe 30% real leather on some parts of vans seats and man made materials for the rest.
Still Odyssey looks like a good van so far and drives well.
In addition to mentioned above, drives like a car, easy steering
Road noise, real and better quality leather inside