Thanks very much for the quick replies. I actually did visit an Airstream dealer, looked at both models, and saw the differences in the interior decor, but I couldn't understand why those differences, which didn't seem to be significant, would result in the price difference. Unfortunately, the salesperson who showed me the trailers was unable to explain this, and a number of other things, to me. (That in itself was a surprise). In fact, I've learned a whole lot more by joining this site than I did from talking to her.
One other thing I noticed was that the 20' Bambi I looked at, in addition to having a larger kitchen area, had what appeared to be a heftier frame. Is this something worth considering?