>>8054448Better control of the spray (so you can draw nicer lines), better atomization (so you can paint nicer shades and not waste paint).
Quality becomes more important the smaller your needle gets. I would argue that you would not notice a difference between 0.5mm Iwata and 0.5mm no name chinese airbrush, but boy will you notice a difference between anything chinese 0.2mm and 0.2mm Iwata Hi-Performance+.