Just replaced my Note 3 SD w/ Note 4 Exyons.   Note 4 Exyons w/ Headphones (ATH-ESW11) sounds a lot better then Note 3 (-less harsh & more resolving) & also better then Note 2 (-more resolving).   Also tested Note 4 SD, but in less-then-idle environment - it seems like the Note 4 SD, sounds...