16x16 and 32x32 allow for the same proportions though (including alpha-ed out pixels).
And if the icon looks ok in 32x32 on a low-dpi screen, it will look doubly so as a 16x16 virtual pixels with doubled resolution underneath in a high-dpi one.
And if the icon looks ok in 32x32 on a low-dpi screen, it will look doubly so as a 16x16 virtual pixels with doubled resolution underneath in a high-dpi one.
A bunch of details really close together looks like noise, not information