>>65192306Basically, butter is an animal product while margarine is a plant-based product.
While butter is naturally solid and thus has a low percentage of water in it, margarine is naturally liquid and thus requires emulsion and stabilizers.
The high liquid content of margarine also contributes to the "spreadability" of it, but the emulsifiers and stabilizers make it extremely unhealthy, and is the reason why people refer to it as "plastic".
Margarine is basically on the level of eating junk food while butter is the "healthy" alternative (still calorie dense)