Question

سگ زرد برادر شغال است :

 در ناجنسی هر دو مثل هم هستند . 

Answer 1

If the negativity of the meaning has already been made clear in the context, maybe you can say, "They are both cut off from the same cloth."

http://idioms.thefreedictionary.com/cut+from+the+same+cloth

 

 

Comments

The Persian proverb is certainly negative.

Nice answer, +1

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Thank you man. Of course, by context I meant the one which is to be created with English.

Answer 2

Since in American-English literature word Jackal and its behavior as carnivorous animal is also applied to Killers and the vicious personalities, so I thought this sentence may fit the occasion, However, it is not the exact match for the term in Persian proverbs:

A Killer (instinct) is a killer, regardless of its name or mask.