Handling
With its tighter turning circle, the Toyota Sienna is most certainly more maneuverable than the GMC Savana 1500, something to consider if you do a lot of city driving; on the flip side, keep in mind that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The GMC Savana 1500 has a more massive engine than the Toyota. Bear in mind that smaller engines are often cheaper to fix, but smaller engines can be stressed more.
The GMC Savana 1500 packs quite a wallop compared to the Toyota when it comes to torque, which is roughly equivalent to acceleration.
The Toyota Sienna could learn a lesson or two from the GMC as far as torque.
Utility
The Sienna will most definitely prove more practical than the GMC Savana 1500 for those of you with frequent kid-cargo.
The GMC Savana 1500 is likely a better choice than the Toyota Sienna regarding transporting cargo, especially if you frequently need to carry a lot of loot or big dogs.
Towing is considerably more the Savana 1500's forte than it is the Toyota Sienna's.
Convenience
You'll definitely have to take the GMC Savana 1500 for a fill-up more often than the Toyota Sienna because of its tank size and fuel economy.
Comfort
Taller drivers will significantly enjoy the extra head room in the Toyota Sienna's front cabin compared to the GMC.
The Toyota Sienna provides more head- and leg-room to your passengers than the Savana 1500 does.
Dimensions
The GMC Savana 1500 is significantly heavier than the Toyota Sienna.
Your wallet will hurt more every time you fill up the Savana 1500 than the Toyota Sienna because of its bigger tank.
The Toyota Sienna and the GMC compete for the same parking spaces.
The GMC Savana 1500's longer wheelbase will likely result in a smoother, more stable ride; on the flip side, the Toyota Sienna may give a sprier feel in daily traffic.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. The Toyota is considerably cheaper to get to the dealership than the GMC Savana 1500.
The Savana 1500 requires a lot of gasoline compared to the Toyota Sienna.
Producing an exact fuel economy evaluation is so difficult that some think not even the federal government can do it, but it looks as though the Toyota Sienna is the winner with respect to gas mileage.
The GMC Savana 1500 isn't much less pricey than the Sienna when it comes to MSRP.
The GMC Savana 1500 will cost you a lots_of_money in gas every year compared to the Sienna.
The Toyota will save you a lots_of_money at the pump every year compared to the GMC Savana 1500.
Warranty
The GMC Savana 1500 and the Toyota Sienna have the same basic after-sale protection.