I own a VC200L and when I purchased it the VMC didn't exist.
They are of different design. The VMC has a longer focal length at 1950mm vs 1800mm.
The VMC has a meniscus lense infront of the secondary and is more similar in design to a mak. I read one review that commented that the corrector gave a "weak tea" hue to the moon visually. I don't know how flat the field is with this scope and that is probably the most important petential difference between the scopes.
I can image with my VC200L with my 40D and have star sizes and shapes exactly the same across the entire field. With the vixen focal reducer it isn't quite as good and there is a slight elongation of the stars in the very corners of the image. This is still much less than most of the ED refractors give.
There is a review of the VMC here
http://www.astromart.com/articles/ar...article_id=486