Vandersteen 5a carbon vs 5a


Is the 5a carbon worth the $10,000 more than the 5a? If you have compared both I would love your opinion and why you came to that conclusion. 
tooth2th
There is so much talk about Vandersteen 5 ct ,5a, and Quattro ct I can’t believe there are not more options!
more options for ya:

Treo CT with sub 3 = approx $11,500

Treo CT with 2 X sub 3 = $ 14,500

Treo CT $8,500

VLR Signature $3,250 + Soundanchors

VLR Signature + Sub 3 $ 6,250

VLR Signature + 2 x sub 3

regular VLR $1350 ......

3a signature.......

the list goes on !!!!!
I heard the Quatro CT and the 5a C this spring. That tweeter really is special. The mid-range on the 5AC was also very grain free and lovely. I too have been tempted by the bird's eye maple pair. 
Does anyone know for sure that all the drivers are replaced during an upgrade? I know the tweeter and mid-range are, but I'm curious if the factory replaces all drive units.