@Mike do you know how much is added on Southwick shoulder measurements, i.e. from 36 to 37? Size 36 fits right on shoulders and is snug all around. Fit is good. Just hesitant to order multiple SC's without knowing exact sizing. Not sure if 36 unstructured would give me more room. I tried on the old Napoli fit in 36 and is spot on the shoulders, still snug though. Thank you.
I think the unstructured jackets feel a bit more generous since there is less "form" to the jacket, but sizing up one sounds like a good idea. Again, I was in the same boat. 38 structured is pretty much a no-go, 38 unstructured is pretty good, but I would take a 39 in either if given the choice.