I agree. I own both OSB and Alden's on the Barrie. The Barrie is a 9 and the OSB a 9.5. While socks can make a difference, I would not go a full size down and count on dress socks, especially since the OSB last is very roomy in the toe box, so your socks help fill it out, but the Barrie (and from the comments here, the 2030) is a bit narrower, so going down a full size would be much narrower than the OSB.
Haha thanks guys. I guess I'll stick with the 7D for now and work from there.