u will miss this:

htc one m8 = dual stereo frontal speakers

vs

note 4 = single mono back speaker

If only Note 4 comes with dual front stereo speakers like HTC One M8.

Because the mono speaker is placed at the back, you could hardly heard the volume since your palms will be blocking it.

It becomes apparent when you are playing games, watching youtube or listening to music while your phone is placed on the table.