Hi AnalogJ,
There is more informaton about the pros and cons of different types of mattress protectors in post #89 here.
Both of the wool/cotton protectors you are mentioning would be good choices along with some of the others that are mentioned in the protector post as well and the main difference between them would be in the amount and type of wool (thicker wool layers will have more of an effect on the “feel” of your mattress).
Some of the non organic wool can be just as high quality and “safe” as wool that has been certified as organic and they can also use organic farming methods even though they didn’t go to the extra expense of having the wool certified organic. There is more about organic certifications in post #2 here.
I would have no concerns with the wool used in any of these protectors.
Phoenix