What are the differences between kraits and vipers?

Kraits are apart of the group Elapidae (elapids) which include other neurotoxic snakes such as Cobras and Coral Snakes. This group is separate from the other main group of venomous snakes, Viperidea (vipers), which include Rattlesnakes and Puff Adders.

That being said, there are many differences between elapids and vipers. Elapids are generally long, slender snakes with small, fixed front fangs. Vipers on the other hand are usually stout-bodied with a triangular lance-like head that have long, hinged front fangs . Also, elapids possess neurotoxic venom while vipers have hemotoxic venom (in come cases have a blend of both as seen in Neo-tropical Rattlesnakes)