it's not true that i'm a special agent from dior lol
from my experience, some says you have to size up 1 when you come from diesel to dior. some says you stay with your original size. it really depends on what leg shapes you have. for me, i stayed with my original size with diesel (sz27). but there are some differences between MIJ and MII. MIJ 19cm fits the same as MII 17.5cm. i know this is complicated. i'll send you a more specific report about size/cut/fit all of them if you're interested. what's your size in diesel?