To be totally honest, with only about ten cents per round difference, I don't find any true cost advantage in one over the other. Both are top notch so I'd probably buy which ever I could find at any given time. If you're an IHMSA member you may be able to find a source that offers a lower price because of that affiliation.
Can't say as I blame you for trading the 7MM-08 for the 6BR. In fact, most of the Wichita Silhouette pistols I'm acquainted with are smaller calibers (e.g. .243) and I don't know anyone who shoots the larger versions like the .308, etc.