Hi Nuclearmomb,
Just to confirm Jeff’s comments … if the 100% natural latex is from Sri Lanka then it would be Dunlop.
There is also one more link that you may find helpful besides the ones that Jeff linked which is post #7 here which has more information about some of the differences between Talalay and Dunlop. Both types of latex are a very high quality and durable material and come in a wide range of firmness levels. The choice between them would be a preference choice and not a “better/worse” choice.
Phoenix