Contrary to popular belief, the 2016 Audi R8 V10 plus does NOT make 610 horsepower! It only makes 602 because Audi's official figures are in metric horsepower, not brake horsepower.
And yes, there IS a difference between metric horsepower (PS) and standard horsepower (HP/BHP). 1 HP/BHP = 1.013869665424 PS. 1 PS = 0.98632 HP/BHP.
And just because you see HP on one site does NOT mean it’s BHP! It could in fact be PS. Audi, Lamborghini, Ferrari, Porsche, McLaren, etc. still use PS to this day.