Hi lesibly,
I think dn has covered most of the comments I would make but I will definitely add … congratulations on your new mattress 
The difference between a dominating layer (firmer over softer) and a progressive layering (softer over firmer) can be interesting and different people will respond to it in different ways.
While the Nutrition (Plushness level 8 ) is “rated” as being softer than the Nature (Plushness rating 7) there are many people who are more sensitive to the firmness of the top layers than they are to the firmness of the deeper layers that would say it was actually firmer than the Nature. This can be very subjective. There are a few more comments about the difference between them in post #2 here and there’s a little more about dominating layers in post #2 here.
I would guess that your layering will certainly be “in the ball park” in terms of approximating the Nutrition (the only major difference is the wool cover which may firm up the latex below it a little bit).
If you switch the top two layers around it may have some similarity to the Nature but there would be an extra inch of softer latex which can make a significant difference even though it has a wool cover which would firm it up a bit so it will be interesting to hear your feedback about how they compare in this configuration. It would probably be somewhere “in between” the Nature and the Beautiful but of course each person may “rate” them differently.
I think you made a great choice and it will be interesting to hear your feedback when you receive it and test the different configurations.
Phoenix