Originally Posted by
dfs24
Both are business class tickets, but from different fare buckets. There is no actual difference between the service one would get. Or at least not that I know of.
One of the fare is discounted, and I believe that and assume that Z is the discounted business class fare because for the majority of the airlines, Z is discounted fare. On certain airlines, such as United, they only give 100% miles for Z class tickets.
False. Booking classes vary by airlines. There is a good summary for *A airlines in the *A forum sticky.
Flying United in Z class and crediting to Mileage Plus only earns 100% miles. But business class bonus is earned when crediting to some other FFPs. Likewise, Z class flying some other airlines may earn differently. There are no absolutely common classes in terms of fare type/earning rates/etc.