Hi ineedmoresleep,
Thanks for the update.
Outside of the two topics you linked and have already read … post #4 here may also be worth reading as well.
If you are one of those that is more sensitive to the resilience or “vibrations” of latex … then as long as you have ruled out any other causes for your experience (such as making sure that you have a suitable support system that has little to no flex and would be similar to the floor or making sure that the cover, protector, and your sheets and bedding aren’t too tight and causing a “trampoline” effect) which it sounds like you have then outside of returning the mattress it may be worth trying either a fiberbed something like this or like this (which may also provide some of the “feel” that your wife seems to like and some localized relief for pressure points), exchanging your top layer with memory foam (which has higher hysteresis and absorbs energy unlike latex which is much more resilient) or adding a relatively thin memory foam topper to your mattress. Replacing the top layer with memory foam or adding a memory foam topper would probably be the most effective solution for reducing or eliminating the transfer of the “sharp” movements that you are describing…
Phoenix