Just switched from a 2005 Sienna to 2006 Dodge Grand Caravan SXT. The Caravan has much more torque making it more responsive in normal driving, brakes are far better, excellent handling. Feels like a relatively nimble mid size sedan. Surprising to look behind and see how large the interior is. Lots of open space in the cabin is great for holding stuff and allowing easy movement within the cabin. Build quality appears to be excellent. Much better choice than a Sienna. Sienna is all hype. Gas mileage on the Caravan although rated 18/25 has been better than the Sienna rated 19/26.
Handling, engine responsiveness, brakes, steering feel, stow-n-go, open floorspace.