I have the opinion that the aftermarket makes a better brake rotor.The O.E. has limitations concerning weight from the factory. Toyota makes every item on the truck as light as possible to save weight for the gas mileage. This is done by all the manufators to meet the EPA standards, and if you examine brake rotors from 10years ago to the present and you would see the weight and thickness of the brake rotors now are thinner and lighter.
The aftermarket has no restrictions on weight, so the aftermarket brake rotor is thicker and stronger. The Brembo brake rotor is a known company with a large research and developement dept., so the items they sell are a good quality.GoodLuck.