Hi oncojoon,
The post about the pros and cons of all latex vs a latex polyfoam hybrid would be relevant to any weight although higher weights will also feel more of the effect of the deeper layers than lower weights … but much higher weights may also do better with a thicker all latex mattress (see post #14 here). Lighter weights may notice less difference between a latex hybrid that has 6" of latex on top such as the Alexis (as opposed to a hybrid that used 3" of latex on top) and an all latex mattress and some people would notice more difference than others just because different people are more or less sensitive than others to smaller differences in a mattress but most people would notice a difference between an all latex mattress and a latex hybrid that used the same type, thickness, and softness (ILD) of latex in the top 6" but had a polyfoam support core.
You can read more about the different types and blends of latex in post #6 here. I’m not sure which type of latex it was referring to but I would question its accuracy if you are talking about Talalay latex although it would be more likely to be accurate if you are referring to molded Dunlop latex.
You can also read more about the general differences between the “feel” of Talalay vs Dunlop in post #7 here.
Phoenix