Spot the difference

The two photos above are the two different leopards here in Rooi-Els. We are currently trying to find different ways to identify them so far we have noticed that the one is more bulky than the other and we have confirmed their identity by their different spots.  Perhaps different genders, or maybe it is because there is an age difference between the two? It is uncommon to have two males in the same territory so perhaps this is the boarder of both territories if they do happen to both be male. Some more photos below. 

Leopard 1

Leopard 2
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some video footage of the two leopards