Question: what is the difference between ipod nano 4th and 5th generation?
Answer: The displays are different as well -- the iPod nano 4th Gen has a portrait-oriented 2-inch (diagonal) color LCD display with a blue-white LED backlight (240x320, 204 ppi), whereas the 5th Gen has a larger, higher-quality 2.2" TFT display (240x376, 204 ppi).