Brand bias?
I'm thinking that the average consumer wouldn't have known they were the same machine underneath, and bought one over the other because they perferred that brand. I see that a lot with today's KitchenAids, Maytags and Whirlpools, where people will spend more for the Maytag or the KitchenAid, despite it being the same machine as a Whirlpool that is literally sitting right next to it on the sales floor. That's the only reason I can come up with.
Thatwasherguy.