Do you think it is worth the cost to have Vatche make a curved wedding band at the same time they make the engagement ring. Or will a generic work just fine? The cost of the Vatche wedding band made for the Royal Crown is approx $1200.
I'd definitely use a straight wedding band with that ring. In the future you may even want to add a diamond band and it will be best for all of them to have straight shanks.
It depends on how important it is for you (or your sweetie?) to have the wedding ring sit flush to the engagement ring. Personally, I like the way a flush fit looks, but... it looks like a regular wedding ring would be offset from the Vatche Royal Crown setting by only a very small amount (assuming the w-ring doesn't sit too high), so in this case, I think I could live with a regular ring. However, that gap might drive somebody else crazy!