Hi Nemix,
Thanks for letting us know what Bob told you … he’s a good guy 
[quote]I thought the Tromsdalen Latex topper felt softer than the Morgongava Latex mattress in stores but I wasn’t 100% sure but now with confirmation from Mountain Top saying the Latex in the Morgongava mattress and Tromsdalen topper are different manufactures which would result in a likely different ILD ratings also.
If I’m not correct (just a scientific guess) the IKEA Tromsdalen Latex topper very likely corresponds with a 18-20 iLD rating similar to a C2 rating from Mountain Top Latex since the topper did feel softer than C3 Mountain Top Latex in stores and is labelled as a Pillowtop but this is still an uncertainty unless we get information on where the Latex for IKEA toppers are manufactured. [/quote]
It’s possible that their topper comes from Sapsa which owns the patent for continuous pour Dunlop latex that Mountaintop uses and is a supplier for Ikea in various parts of the world but of course I don’t know this for certain.
There are some rough comparisons between the Mountaintop firmness ratings and firmness ratings for Talalay latex at the end of post #8 here that may also be helpful.
Phoenix