Mark, for the most part, an argument over asthetics and fashion. Many people feel their choice (in all things) must be "right" and any other choice "wrong," or at best substandard. Among sidelock owners arguments rage over which brand is best. Same for boxlock supporters. Per Larry above, precious little of substance to debate.

When I first met Dig Hadoke some years ago, he was a strong sidelock man, Purdey's if you please). You need to read his new book on boxlocks, if you have not yet done so.

DDA