I have been using the original Hydro as a QD anyway. I use it like a QD each time I drive my car. I have Slick and love it, just curious if Hydro is the better option.
I don't think Hydro has any cleaning properties, so if there is any dust/dirt on your vehicle it might not be the best idea to use just Hydro to clean it. But thats just my guess.
The description for Hydro says it can be used as a QD, but I kind of agree that maybe Slick would be preferred with respect to light cleaning..it's all good.