The teen's giant, and I mean really big, "World badge" is probably the rarest.
I have only seen one in all the years I've been doing this.
As for badges being on more deluxe bikes, etc, Schwinn is a hard company to say that about.
I have a badge for the Omaha 30's/40's dealer, a Maurice Frank badge.
Mr. Frank sold every type of Schwinn available and put his badge on them.
To me and what I have seen, Huffman and Westfield were the only companies to use different badges on their top bikes.