Not an answer, but a helpful guide. Don Hardin’s Doublegun Comparison Chart
Note the prices are the catalog MSRP and dealer selling prices may be much less

[Linked Image from photos.smugmug.com]

John Houchins' comparison chart is under "General Information" here
https://lcsca.clubexpress.com/content.aspx?page_id=274&club_id=43784