Don't know if this will entirely answer your question, but if may give added insight.
I checked out the 1990 Hi-Lo Trailer brochure, and in the portion listing specifications and floor plans, it shows the FunChaser and FunMaker simply as two of the different models available that year. That year Hi-Lo offered four different basic models, Bon Voyage, Voyager, FunChaser, and FunMaker, top to bottom. The Bon Voyage and Voyager were offered with a number of different floor plan variations. The FunChaser that year, at 22', was two feet longer than the FunMaker, but both were equipped the same. FunMaker was the smallest/lightest outfit Hi-Lo offered then.
Hope this helps,
1967 17' Hi-Lo Bon Voyage (1967-1969)
1969 19' Hi-Lo Bon Voyage (1969-2011)
2004 27' Hi-Lo TowLite (2010-present)
2015 Chevy Tahoe LTZ