Handling
With its tighter turning circle, the Kia Rio is most certainly nimbler than the Toyota Corolla, something to consider if you do a lot of city driving; on the other hand, remember that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The Kia Rio's engine is a tad smaller than the Toyota Corolla's, but not terribly so.
Torque is the force that lets you accelerate quickly, and in this respect, the Corolla is substantially more powerful than the Kia Rio.
Utility
Neither the Kia Rio nor the Toyota Corolla has a marked advantage when it comes to seating capacity.
Convenience
The Kia's fuel tank will need to be replenished slightly more often than the unit in the Corolla.
Comfort
While the front cabin in the Kia offers a bit more head room than the Toyota Corolla, there really isn't much of a difference.
While the rear of the Toyota Corolla provides a bit more head- and leg-room than the Kia, there honestly isn't much of a difference.
Dimensions
The Kia's tank is about the same size as the Toyota's, though the Corolla's is a little larger.
The Rio and the Toyota Corolla compete for the same parking spaces.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs almost the same to get the Kia Rio to the dealership as the Toyota Corolla.
The Toyota doesn't pale in comparison to the Kia as far as fuel economy.
There honestly isn't much of a difference in gas mileage here, but if you must know, the Toyota Corolla is a little more economical than the Rio.
The Toyota Corolla is substantially pricier than the Kia Rio with respect to MSRP.
Warranty
The basic warranty that comes with the Toyota Corolla isn't quite as generous as the Kia Rio's.