You want quality or quantity? You get much better coverage with the Pactra Acryl, it shoots much cleaner and smoother, bonds better and dries nicer. It's easier to remove masking when using Pactra over parma, with parma if you lay it on a little too thick you can pull up paint when lifting the masking, Pactra is a little more forgiving. Which brings up another tip, lay down several very light coats rather than a heavy one, the first coat should almost be a mist coat to seal around the edges of any masking, this will help prevent bleeds. So to me it's worth it.