Well, that's a tough recommendation as any of those mics are a giant step up from the V63. I'm not sure I'd agree with Chesrocks statement that the C-1 is a better mic than the B-1. Regardless of the price difference, they're really just different good mics & I suspect one will sound better in some applications while the other will sound better in other applications. The B-1 is neutral sounding enough to be very versatile as an all around instrument & vocal mic whereas I get the impression the C-1 is aimed more at being a killer vocal mic, though some people claim to have gotten decent results with it on other things as well..
All that being said, in your case I think it might be best to push Mars to do an exchange for the V93, even if you have to sacrifice a restocking fee or something, I think if you push them & upgrade to the V93 they'll go for an exchange. It's a great sounding mic IMO. If you've tried it & like it, go for it. You know what you're getting then. The B-1 & V93 are in a similar class & sound IMO but the V93 may have a little more vocal sheen.