Hi Dan1979,
I don’t see anything in the descriptions that jump out as being inaccurate and they appear to be complete and transparent to me.
The first link uses 20% natural and 80% synthetic rubber and the second one is an 85% natural and 15% synthetic blend (which means that densities can’t be accurately compared to each other or to 100% natural rubber because synthetic rubber is not as dense as natural rubber).
Both use Dunlop latex but they are different blends of natural and synthetic.
Unfortunately I’m not familiar with the European market or which of the North American manufacturers or retailers ship to Europe. There is a list of the members of the site that sell latex mattresses online in post #21 here that you could look at and compare to the two you are looking at but you would need to email them to see which ones can ship to Europe and the costs that would be involved.
I’m not quite sure what you mean by this … is your concern that the higher density would be too firm for you?
Phoenix