Different contours in m character

On small sizes the spaces between vertical stems of letter m rendered randomly a bit different (on screen). The same situation with contours happens with some other letters like u, o, b, d…

Is there any way to improve it? To equal contours? If manually do NOT hint the middle stem than contours will be similar but it appears fuzzy.

I am afraid this is about as good as it gets in PostScript hinting. You can do a little more in TrueType.