I totally see the difference - I actually like the Brown Bass shape way more than the current Small Standard body. It's just that for some reason, at the widest point of each body, the Brown Bass looks like it is more narrow...know what I mean? It may indeed be just an illusion.
Maybe it's exposure to Stanley from back in the day, but the Brown Bass with the pickup selector on the lower horn is where its at! There's just something about that bass....