Hi absolude,
The Talalay blend is actually closer to 30/70 (although it’s not exact and varies depending on various factors) but this is not significant anyway.
You can read more about the differences between 100% natural Talalay and blended Talalay in post #2 here but in the softer ILD’s the blend would likely have an edge in durability. The difference would probably be more with talalay made by Latex International than it would if the Talalay was made by Radium who have told me that their testing indicates that their 100% natural Talalay is very close to or the same as their blended in terms of durability even in softer ILD’s although longer term experience in “real life” is still needed to confirm this.
You’re certainly correct about this. The cover and the quilting materials can make a significant difference in the feel and performance of a mattress.
This would really be a personal preference but in general people who wanted a more natural product for personal reasons regardless of any performance or safety benefits would choose the 100% natural Talalay and those who were more value conscious or who wanted a little bit more durable latex in lower ILD’s would probably choose the blended.
They are both high quality materials.
Phoenix