What are the differences between 27x1 1/4 bike tires and 700c tires?

27x1 1/4 bike tires and 700c tires differ in their diameter and compatibility. 27x1 1/4 tires have a smaller diameter and are not interchangeable with 700c tires, which are larger. It is important to ensure that the tire size matches the wheel size for proper fit and performance.