Thanks, foo - appreciate the detail shots (the Hermes in the wild!).
It seems that all Italian tailors charge more for an overcoat relative to a suit (Mina also charges 30% more). Must have something to do with the handstitching involved, as the SR crew charge the same price as a suit.
I dunno, maybe it has to do with cultural expectations? I'd like to believe it is due to the use of so much hand-sewing, but it might just come down to the English being more rational about pricing. Given what I've learned about shopping in Italy, the latter is--sadly--perfectly plausible.