I have an iPod 5 and my cousin had the 4, so i know what the differences is. For one, the 5 is much slimmer/longer than the 4 and the charger for the 5 is way smaller than the 4. The 5 comes in different colors, and the screen is bigger. Also the 5 has Siri just like the iPhone's. An the 5 has more space and more things on it.