What is the difference between mustard green and kale?

Mustard greens and kale are both leafy green vegetables but differ in flavor and texture. Mustard greens have a peppery, slightly spicy taste and tender leaves, while kale has a more robust, earthy flavor and thicker, ruffled leaves. Additionally, mustard greens typically have a lighter green color and can have a smoother texture compared to the crinkly leaves of kale. Both are nutritious and commonly used in various culinary dishes.