Almost all cars are limited by the tyre grip for how fast they can de-accelerate. Putting bigger breaks or adding engine braking power won't have impact on how quickly you come to a stop.

I'm not sure how well regular cars are at brake balance between the front and rear, so in theory if the rear wheels do very little braking you could stop a bit slower if you drive a rear wheel drive car and do some additional engine braking. But around 80% of the braking is done by the front wheels so it won't be that helpful.