jip,i tried the MG QD on my dad's car yesterday. It doesn't remove dirt so easily as I thought. If yr paintwork is clean and it's dirty, the QD would do the job. But if dirt stuck into your paint... then it requires some elbow srubbingon it.So, i turn to NXT Booster Wax. And it's amazing how quick it removes the dirt and shines the car. I m impress with it. So, did the whole car. The car is still with the original paint since 1997 and no clearcoat. So, it's solid white and very easy to trap dirt. The NXT BW helps to clean the car and shines in 1 hour.So, that's the difference between NXT BW and MG QD. Hope this helps