I'd like to know (1) which of the following is the most natural and (2) whether any of the following is unnatural or ungrammatical:
(A) My system is no more expensive than yours would be.
(B) My system is no more expensive than would be yours.
(C) My system is no more expensive than would yours be.
Edit: I'm adding three more examples with "as". The same question as above.
(D) My system is expensive, as yours would be.
(E) My system is expensive, as would be yours.
(F) My system is expensive, as would yours be.