Oats come in a lot of varieties, steel cut, rolled oats, quick oats and instant oats. These are all basically oats. The main difference is their cooking time. Steel cut oats are made by cutting groats into smaller pieces using steel blades. To get rolled oats, you take these cut pieces and flatten them. You can take these oats and then cut into smaller pieces to help decrease the cooking time. Steel cut oats may have a slight advantage due to it's form as it is a lower glycemic food. However, all oats provide an abundance of nutrition including fiber, so which ever form you enjoy, stick to it for the health benefits.