1) The euchromatin is less intense than heterochromatin which means that heterochromatin has more stringent DNA packing
2) Heterochromatin contains more DNA than euchromatin
3) Euchromatin has more lightly packed form of chromatin than heterochromatin
4) In structure, heterochromatins contains inactive satellite sequences, and many genes are repressed to various extents, centromeres and telomeres. Where some cannot be expressed in euchromatin at all.
5) Under the optical microscope euchromatin is represented as light-colored bands while heterochromatin is represented as dark-colored bands
6) Euchromatin is found in eukaryotes and prokaryotes (in eukaryote cells with nuclei and in prokaryotes