THEMBELANI TANDEKILE XUNDU
Okay, there isn't that much difference but I understand there is a difference, conventional speaking, but that's not the point for today.  The emphasis between a unit and a cell, you say that a cell is relatively smaller than a unit.  It may be a cell of two people of three people but when we are talking about a unit it would be a commander, a commissar and a logistics officer, ordinance officer, depending on the tasks and the purpose of setting up that unit.