What is the difference between corn and sorghum in the field (that is, stems, leaves, ears, etc. Except corncob)?

I have bred corn and sorghum, but I still don't know the shape of them at seedling stage, which is a bit funny.

When I was breeding, I heard several farmers talk about the difference between sorghum and corn: sorghum stalks are round, while corn stalks are a little off; Sorghum leaves are narrower and longer, while corn leaves are wider and shorter; Corn stalks are thick and short, and sorghum stalks are slender. Other aspects are almost difficult to distinguish at seedling stage. However, in the later period, the difference is very obvious. The corn stalks become thick and the leaves are wide. Corn (female inflorescence) grows in internodes, and the top is male inflorescence. Sorghum only blooms at the top, is hermaphrodite, and generally has tillers at the lower part.

Sorghum is used as a broom. After threshing, the ear pressure is biased, which is a common broom. There is also broom sorghum specially used to tie brooms. Broom sorghum is a variety of sorghum. Its ear is particularly large, but it is loose and its seed yield is low. Mainly used to make brooms.