I have the N4 and the speaker is great.So you're claiming that the tinnny Note 4 speaker sounds excellent? It may be loud but it's horrible in my experience. Of course some people won't mind, or won't ever use it. If you intend using it then I would wager it's a dealbreaker.
But you missed my point. Because you read on XDA that a few people felt the speaker was not to their liking and returned the n4 for that reason. Is that what you are basing your statements on? Because a few people on XDA felt that way? Thats not very accurate facts. In the links i gave you. People here on MR are having problems with their IP6...should we all assume everyone is having the same problem? Or should we all assume if a few people had a problem with say a yellow screen on an IP6...that the screens are all bad on the IP6?
Do you see what I mean?
https://forums.macrumors.com/threads/1828770/