Denon and Marantz maybe "under one roof" but so is McIntosh but I believe most would agree that McIntosh is better made and has superior sound.
D&M Holding owns Marantz, Denon, and McIntosh, as well as a few other companies. Before 2002, Denon was a separate company.
I know they share a lot of the same parts (that's how you keep cost low), Denon and Marantz have seperate design philosophies and some of the features may only be avaliable on a Denon but not on the Marantz (at least at first), however I do not know if they are actually made in the same factory.
I do not think there are any significant differences between the two.
D&M Holding owns Marantz, Denon, and McIntosh, as well as a few other companies. Before 2002, Denon was a separate company.
I know they share a lot of the same parts (that's how you keep cost low), Denon and Marantz have seperate design philosophies and some of the features may only be avaliable on a Denon but not on the Marantz (at least at first), however I do not know if they are actually made in the same factory.
I do not think there are any significant differences between the two.