King Cobra Vs Black Mamba

Question
QUESTION: If there is a fight between a King Cobra and a Black Mamba, which one will win? Also, out of these two which
one is faster in moving, which one has the deadliest venom and which one has the best strike?

I saw a programme on the Animal Planet yesterday and the #1 ranking was given to the Black Mamba among other snakes.
But, unfortunately, the King Cobra does not figure in the list of 7 snakes that they showed. So, I want this to be clarified from you.

Thanks for your service.

Regards,
RSM

ANSWER: From what I know, the king cobra is more venomous than the black mamba.    King cobras can kill 5 times faster.  King cobras are also capable of injecting higher amounts of venom if necessary because of their size and fangs.

---------- FOLLOW-UP ----------

QUESTION: Thank you Adam for answering.

So, if there is a fight between a King Cobra and a Black Mamba, which one will win - is it the King Cobra? Please confirm.

Also, I heard that the Australian Jungle variety - the Fierce Snake (or Inland Taipan) is the most deadliest and
poisonous snake in the world. Is it true? and if there was
a fight between King Cobra and the Fierce Snake, which one will win?

Thanks for your service.
Regards,
RSM.

Answer
Who would win is an impossible question because it depends on the individual snake, not the species itself.  But advantage wise, the King cobra is more likely, they eat other snakes for breakfast, literally.  King Cobra feed on other snakes, sometimes other king cobras.  

The thing about the fierce snake is definitely true.  This is a tough competition.  I'm going to say the Fierce snake because it is most poisonous.  One bite from it and the king will be dead.