The battery life, mainly. I have the same Classic, and the iPhone. I LOVE the 160 Classic…my entire music collection, a vast collection of podcasts and audiobooks, and pretty much whatever movie or show I want on it at any given time. It can make trans-oceanic flights with ease (for audio…all but the longest flights on video). Even in “airplane mode” where all the radios, GPS, etc are turned off, the iPhone doesnt even come close. Its understandable with the huge color screen (great for movies, not so much for the poor battery). I actually wish the Classic could go into black and white for extended efficiency if i wasnt in movie mode…
I like that the classic does what it does and does it well, with phenomenal battery life. Its a lifesaver on trips.