Human: What is the difference between a sweatshirt and a hoodie? Assistant: 
The main difference between a sweatshirt and a hoodie is that a sweatshirt typically has a zipper or buttons at the top, while a hoodie usually does not. A sweatshirt also tends to have longer sleeves than a hoodie, which can be useful for keeping your hands warm when you're working outside in cold weather. Additionally, a sweatshirt may have more layers of fabric than a hoodie.