I would with an educated assessment of what I have experienced say the CAST vs. VSF in a very critical or higher power application will most likely have an edge in some cases, again depending on the application..
However I have experienced as with many things I really know that the VSF in a speaker vs. a Cast I would give the edge to the VSF simply sonically being not too much of a good thing or whatever, and the fact it is definitely at the helm via point of diminishing returns already I am sure, and I feel the same with the MR caps, Even the audio note silver due to cost, or the V-cap would be a turn in the wrong direction in my opinion regardless just based on cost to performance difference alone. Especially looking at the type of speakers or overall frequency range we are talking about here... I still feel the best for the money but impossible to use in most applications due to the physcial size is the Clarity MR now.
However I have experienced as with many things I really know that the VSF in a speaker vs. a Cast I would give the edge to the VSF simply sonically being not too much of a good thing or whatever, and the fact it is definitely at the helm via point of diminishing returns already I am sure, and I feel the same with the MR caps, Even the audio note silver due to cost, or the V-cap would be a turn in the wrong direction in my opinion regardless just based on cost to performance difference alone. Especially looking at the type of speakers or overall frequency range we are talking about here... I still feel the best for the money but impossible to use in most applications due to the physcial size is the Clarity MR now.