Why would anyone think that a side lock is superior to a box lock?
Your are comparing apples and oranges.
If you think that the Anson and Deeley box lock design is inferior, as a rule, then you do not know any thing about SxS shotguns.
Each and every gun has to be looked upon as an individual.
But, I suppose that there are Ford and then Chevy men. My present favorite car is a pristine 1985 Mercedes 300 D Turbo. It can go from 0 to 60 in a day and half, but it always goes and I look damn good in this classic.
Same for my guns. If anyone thinks that my Diamond Quality Lindner Daly is inferior to a side lock, I have a laugh reserved for you. Same can be said for many British guns.
Best,
John

Humble member of the League of Extraodinary Gentlemen (LEG). Joined 14 March, 2006. Member #1.