Hi Fantito19768414,
Hopefully jwdw will see your post and share their comments but I can make some general comments about your questions that may be helpful.
There is more about the smell of latex in post #2 here.
Some people can be sensitive to certain smells that doesn’t affect others or that some people don’t even notice at all but the initial smell of latex (that you smelled with your samples) will generally dissipate to levels that most people don’t notice over the course of the first few weeks.
While it’s not possible to quantify the sleeping temperature of a mattress for any particular person with any real accuracy because there are so many variables involved including the type of mattress protector and the sheets and bedding that you use (which in many cases can have just as significant an effect on sleeping temperature as the type of foam in a mattress) and on where you are in the “oven to iceberg” range and because there is no standardized testing for temperature regulation with different combinations of materials … there is more about the many variables that can affect the sleeping temperature of a mattress or sleeping system in post #2 here that can help you choose the types of materials and components that are most likely to keep you in a comfortable temperature range.
Latex in general is the most breathable and temperature neutral of all the different foam materials and memory foam is generally the warmest although there are many versions of every type of foam (latex foam, memory foam, polyfoam) that can vary in their breathability and temperature regulating properties.
In very general terms … the materials, layers, and components of a sleeping system that are closer to your skin will have a bigger effect on airflow, moisture transport, and temperature regulation than materials, layers, and components that are further away from your skin and softer mattresses will tend to be more “insulating” and for some people can sleep warmer than firmer mattresses.
Wool is one of the best temperature regulating materials (in both directions) that is used in the industry and is used in thinner layers in the desert and in thicker layers in the Arctic because of its effectiveness in regulating temperature. If you have a latex mattress with a wool quilted cover and/or you are using a breathable mattress protector and/or you are using sheets that are made from natural fibers (such as cotton or silk or flax linen) or semi synthetic fibers (such as bamboo or other types of viscose/rayon fabrics) and you are using bedding that is appropriate for the temperature of your bedroom then it would be very unlikely that you would have any temperature regulation issues.
Phoenix