No no, size down doesn't mean you go from Long to Regular, it means you go from 40L to 38L. That'd explain the short sleeves also, which can hopefully be tailored to the right length. The shorter jacket makes this look, to me, like something for nights out at clubs.
I do have another Napoli from the SS outlet coming in next week at 38L. Guess I'll know soon enough. What sucks is that this current one I have is not listed on the SS store anymore. Really like the color.