The Mojave rattlesnake is the most venomous rattlesnake in the United States, surpassing even the Western Diamondback in terms of deadliness. The Mojave rattlesnake has a more potent venom that can cause serious harm or even death to its victims. While both snakes are dangerous and should be avoided, the Mojave rattlesnake poses a greater threat due to its venomous nature. It is important for individuals to be cautious and educated when encountering these snakes in their natural habitats to prevent any potential harm.