Hi IEAngelsfan,
Most people that are considering a topper have a mattress that is too firm for them but the key is “how much” too firm is it which is the more subjective part of choosing a topper since each person experiences softness and firmness differently (which is why I wrote the topper guidelines using more subjective criteria).
This would depend on the relative ILD’s of the talalay and another type of latex you were comparing it to. All types and blends of latex come in a range of firmness levels so Talalay can feel softer, the same firmness, or firmer than other types of latex although it does tend to “feel” firmer for most people if the ILD is the same as 100% natural Dunlop. There is more about the difference between Talalay and Dunlop in post #7 here.
There is more about the difference between 100% natural Talalay and blended Talalay in post #2 here. Natural rubber is denser than synthetic rubber and has a higher compression modulus (which is the rate that a foam material becomes firmer as you compress it more deeply) which also has an effect on how soft or firm a topper feels so a natural topper would feel a little more “supportive” and resilient than a blended topper but a blended topper can be a little more pressure relieving (you will sink into it a little more deeply) if the ILD’s are the same (which they often aren’t because they can come in different ILD’s). There is also more about the different factors that can affect how soft a material (or a topper) feels in post #4 here. Having said all that … with only a 2" or a 3" Talalay latex topper most people would feel little if any difference between natural or blended versions.
Phoenix