There is a thin line lies in between these two technical terms..
Certified Used Car
It is the combination of cost of used cars plus cost of the extended warranty in one price.
Certified used car are thoroughly inspected. If any part of the cars found is faulty, it will be either repaired or replaced immediately. Once the car fully satisfies the manufacturer's strict quality standards then it gets the Certificate. If the vehicle breaks down while it is still under the warranty period of Certified used vehicles, it will be repaired free of charge.
Some certified used cars programs also assist if your cars breaks down on road by dispatching tow truck for help. All these benefits comes under one package of Certified Used Car program.
Used Cars With Extended Warranties
Here, the buyer goes for extended auto warranty after buying used cars to insure from the mechanical breakdown. This could be somehow difficult process than the Certified Used Cars program. First you'll look for best used cars then go for the best extended warranty available to match with.
It is observed that cost of extended warranty is expensive because the auto extended warranty agencies have to inspect your cars thoroughly before quoting to your used cars. High or low quotes will depend on the age of your used cars. More it is old, higher the extended warranty and vice versa. Since the dealers quote higher, this could be an extra burden on your wallet. Lastly, extended warranties might not be as comprehensive as that comes with Certified Used Cars programs.