I think it's only the LWB Barrie that seems to fit a bit looser.
Really depends on your feet and what you want to do. To keep things simple, you could get the same size in all Barrie Aldens and could wear a thicker sock with the LWB and be fine.
Or, you could size down on just the LWB and probably also be fine. For me, I can wear 8.5D in all barrie Aldens except LWB, which I can wear 8D with thin socks, or 8.5D and thick socks.
Cool. :) I'm actually working on a video on my Lyr amp as we speak. Should be up in my channel tomorrow.