Larix kaempferi 'Blue Rabbit' isn't at dwarf at all, it will grow into a tree like the species.
The only difference is it's needle colour which is more blue...

A dwarf is a conifer with a yearly growth of 8 till 15 cm per year, which is about the same as 3 till 6 inches.

refer to the link

conifers are grouped by annual growth ....

ALL size estimates are basically.. ten years of annual growth ...

presume.. at 20 years... they will be twice as big ...

since trees never really stop growing.... and conifers are trees.... NEVER presume... they will not get big.. its just a matter of the decades marching on by ...

though it is an exaggeration.. i like to say.. if momma is 352 feet tall ... a dwarf of her.. might only be 238 feet tall .... the point being.. the dwarf would have a lower annual growth rate ...

plant something that will curl your toes.. for ten years.. and then get rid of it.. rather than going all anal on picking something on one variable.. like size alone ....

ken

Here is a link that might be useful: link

So what's the diff between C. atlantica 'Aurea' & 'Aurea Robusta' anyway?

Some discussion of the diff between the two can be found in an earlier Cedrus gallery.

Alex

Here is a link that might be useful: Cedrus libani photo gallery 2010