As I understand, the N6 will have 15sq.in. of screen estate, where the N7 will have 22sq.in, that's a big difference for me. I enjoy the bigger screen for YouTube video and the bezel for the N7 is a good thing making it easier to hold for games and such. And it does have stereo speakers that are decent. Reselling it doesn't get much money anymore, it's more worth it to keep it. Another issue is that my charger is placed away from my bed, I wouldn't want to use up the N6 at night and have the battery drained for the next day. And since both device lacks microSD, I like the extra space on the N7 to put media in.
I'm still on the fence about getting the N6, but probably will wait until Nov 12th to get it at T-Mobile assuming they'll sell it for the same price as Playstore. Can't say I'm happy ordering from Playstore in the past, getting a refund took a long time.