The iPod Nano 4th and 5th generations have several differences in terms of display, features, and design. Here are the key differences between the two models: Display: The iPod Nano 4th Gen has a portrait-oriented 2-inch (diagonal) color LCD display with a blue-white LED backlight (240x320, 204 ppi), while the 5th Gen has a larger, higher-quality 2.2" TFT display (240x376, 204 ppi).
Camera: The 5th generation iPod Nano has a camera, while the 4th generation does not.
FM Radio: The 5th generation iPod Nano includes an FM radio, which is not present in the 4th generation model.
Built-in Mic and Speakers: The 5th generation iPod Nano has built-in mic and speakers, allowing users to listen to music or record their voice without earphones.
Pedometer: The 5th generation iPod Nano includes a pedometer, which counts the number of steps taken, making it an ideal companion for jogging or fitness activities.
Design: The 5th generation iPod Nano has a polished anodized aluminum finish, while the 4th generation model has a curved surface and an oval shape when seen from the top or bottom.
Dimensions: The 5th generation iPod Nano has a taller screen when compared to the 4th generation model.