Who would win in a fight king cobra or a diamond black rattlesnake?

The two snakes live on different continents and would never meet in nature. However, king cobras feed on other snakes and would win such an encounter.

The diamondback i choose is the western diamondback rattlesnake..

Look here, the 4th most venomous rattlesnake,the mojave rattlesnake is already deadly enough to kill a cobra.. and of course the timber rattlesnakes as well as the diamondbacks (both eastern and western.)