Hi skye,
The type or blend of the latex would be a more important consideration than the country that it was manufactured. There is more about the different types and blends of latex in post #6 here but the choice between them is more of a preference and budget choice than a “better/worse” choice. There is also more about some of the general differences between Talalay and Dunlop in post #7 here but the best way to know which type of latex you tend to prefer would be based on your own careful testing or your own personal experience.
Phoenix