The difference between jungle crow and Common crow are:

Jungle crow

  • It is slightly bigger in size.
  • It has shining jet black color.
Jungle Crow | Nagpur Birds

Image Source: nagpurbirds.org/files/pictures/DSC_0804.jpg

Common crow

  • It is slightly smaller in size.
  • It is not jet black in color, it has grayish neck.