Hi kayla,
ILD is a “comfort spec” and not a “quality spec” and isn’t important to know when you are testing a mattress in person because your body will tell you whether a mattress is a good match for you in terms of PPP much more than knowing the ILD of the layers. Most people wouldn’t have the knowledge or experience to know how different combinations of ILD would work for them with different types of latex anyway (and ILD alone isn’t the only spec that will make a difference in how the mattress feels and performs) so for most people, knowing the ILD of the layers would have no practical use and may be more confusing than helpful. There are many manufacturers that treat the ILD of their mattresses as proprietary (see post #10 here)
This depends entirely on your confidence about whether a mattress is a good match for you and on the options that are important to you after a purchase. I linked these in my previous replies but there is more about the most important parts of the “value” of a mattress purchase in post #13 here which would include the suitability of a mattress in terms of PPP, the durability of the materials and components inside the mattress, and the other parts of your personal value equation that are most important to you (including the price and the options that you have after a purchase if a mattress you purchase doesn’t turn out as well as you hoped for). There is also more about the different ways to choose a mattress (either locally or online) and how to minimize the risks involved with each of them in post #2 here. A component mattress with individual layers and a zip cover generally has more options after a purchase to fine tune the mattress (either by exchanging or rearranging layers) than most “finished” mattresses so it can reduce the risk of a mattress purchase.
The better options and possibilities I’m aware of in the area are listed in post #2 here. You are fortunate to live in Calgary because you have some very good local options available in the area that would be well worth visiting :).
Phoenix