Are you doing any critical listening? If not then it may not be worth the hassle, just put the Denon in the bedroom.
If you're worried about the sound differences then you'll have to factor in not just the receiver, but also the sound characterstics of your speakres and room environment.
Obviously you are already happy with the Pioneer in your basement, so I would set up the Denon in the bedroom first and see how it goes. If you're happy with how the Denon sounds with the speakers in your bedroom then leave it there. If you're curious then switch up the Pioneer and Denon and if there is a difference.
