The Frazer was designed to be a standard front engine rear drive car from the start (Graham Paige). However, the Kaiser was originally designed to be a front engine, front drive car to distinguish it as the new design and the future of the automobile. Kaiser ran into trouble getting it into production and reverted to the same drive train as the Frazer. This resulted in the two cars being basically the same except for some minor details and the resulting lack of public perception that they were different offerings from the company. The Buffalo with its front half looking more powerful than the rear legs was chosen to represent the front dive of the Kaiser as well because it also represented the western part of the country where Kaiser was known as the western industrialist.
It might be interesting to note that from interviews with Kaiser executives in the 1960's bulletins, there was serious discussion about badging the 51 Kaiser as the Frazer and the HenryJ as the Kaiser to maintain both names. Since Frazer had left the company, Kaiser killed this idea.