You may be able to tell simply from the pouring consistency that heavy cream differs from half-and-half. The FDA is the best source for proving how different the two substances are. u003cbr/u003eu003cbr/u003eHalf-and-half contains around 10.5 to 18% milk fat which may seem to be a lot. u003cbr/u003eu003cbr/u003eHeavy cream should be thicker which is because it contains between 36 and 40% milk fat so it should taste richer and have a creamier mouthfeel.