Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs roughly the same to get the RL to the dealership as the Lexus.
The Acura RL pales in comparison to the Lexus in terms of fuel economy.
When it comes to gas mileage, the Lexus GS 450h is slightly better than the Acura RL, but not by much.
The RL is significantly less pricey than the Lexus GS 450h with respect to MSRP.
Utility
Neither the RL nor the Lexus GS 450h has a marked advantage regarding seating capacity.
Convenience
You'll most certainly take the Acura RL for a fill-up approximately as often as the Lexus GS 450h.
Comfort
While the front cabin in the Acura RL offers a bit more head room than the GS 450h, there honestly isn't much of a difference.
While the rear of the RL offers a bit more head- and leg-room than the GS 450h, there really isn't much of a difference.
Dimensions
The Lexus GS 450h's tank is almost the same size as the Acura RL's, though the Acura RL's is somewhat larger.
The Lexus and the Acura RL compete for the same parking spaces.
Handling
With their comparable turning circles, the Acura RL and the Lexus most certainly handle roughly the same into and out of tight spots.
Drivetrain
The Lexus and the Acura have similar-sized engines, with a slight advantage to the Acura.
Torque is the force that lets you accelerate quickly, and in this respect, the Acura RL isn't much more powerful than the Lexus GS 450h.
Warranty
The Lexus GS 450h and the Acura have the same basic after-sale protection.