Key Differences Between Grass-Fed and Regular ButterSo, should you buy grass-fed or regular butter? Appearance[2] To some, grass-fed butter may look more appealing than regular butter. Taste“While the flavor of grass-fed butter will change depending on the location and time of year that the cows grazed, the taste is generally richer and more intensely butter-flavored than regular butter,” Malkani says. Nutritional Content[3] Grass-fed butter may have a stronger spread of nutritional benefits than its regular-butter counterpart. Potential benefits of grass-fed butter include its additional contents of heart-healthy omega-3 fatty acids and unsaturated fat (as opposed to saturated fat).