Hi Srockrae,
The ILD specs you listed would be for blended Talalay and the Renew uses 100% natural Talalay made by Latex International so they wouldn’t be quite correct. The 100% natural Talalay has different ILD ranges than the blended latex that are less exact and you can see the ILD range for the different firmness levels of 100% natural here. The Renew is listed as a 9 on the Pure Latex Bliss comfort scale which is the same as the Beautiful (which uses blended Talalay which has more exact ILD’s) so the layers would likely be similar. You can see the ILD specs for the Beautiful here. If I had to guess at the layers in the Renew I would guess they were N1 for the top layer, N2 for the next layer down, and N5 for the bottom 6" layer but I don’t know this for certain. The different covers would also affect how they compare because the Beautiful has a stretch knit cover and the Renew has a wool quilted cover which for most people may increase the firmness a little because the wool quilting can reduce the ability of the latex to contour to your body shape and will also become a little firmer as the wool compresses.
There is more about the different ways that one mattress can “match” another one in post #9 here but once there are differences between the two designs then how they compare for different people would be more uncertain because changes in the design will have a different effect for different people. I would also be aware that Pure Latex Bliss calls it’s blended Talalay “natural” and calls its 100% natural Talalay “all natural” because the ILD’s you listed would be blended ILD’s rather than 100% natural ILD’s. Of course the blended is a little less costly than the 100% natural and is also a little more durable in the lower ILD’s so you may choose to go with the blend if having all natural latex is less important to you.
Not that I know of although I believe that the specs I listed would likely be close.
The closest you could get would be to use the exact same layer thicknesses in the same ILD’s with a very similar cover. Every change you make will have some effect that some people will feel more or differently than others. Most people would notice the firmer feel of the 19 ILD. The better sources for latex layers and and for mattress covers/ticking (including wool quilted covers) I’m aware of are listed in the component post here.
You can read more about the differences between 100% natural and blended Talalay in post #2 here but in very general terms … blended Talalay in the same ILD will be a little more pressure relieving and a little more durable. 100% natural will denser and a little more “supportive” and of course would be of interest for those that for personal reasons prefer to have a more natural material in their mattress.
The only way to know this will be based on your own personal experience. The closer to the specs of your reference mattress you are the closer it will be but again different people will be more or less sensitive to any differences between them.
Wool will generally feel firmer than soft foam materials but there is more about wool toppers in post #8 here and the posts it links to and it also includes a link to a list of the better sources for wool toppers I’m aware of as well.
Some of the online component latex mattress manufacturers listed here here may also be worth talking to about which of their options would likely come closest to the Renew as well because many of them have good exchange/return policies that can reduce the risk of an online purchase.
Phoenix