Question

what is the difference between utility and satisfaction

Answer 1

"Total utility is the aggregate sum of satisfaction or benefit that an individual gains from consuming a given amount of goods or services in an economy." 
Satiation means a feeling of fullness, whether that be with an emotion or food.It is also the idea of relieving as in the sentence "It satiated her hunger."
Satisfaction is more of being content with something. As if something were good enough to fulfill your want. Normally, satisfaction is used with an emotion and satiation with hunger, but the two are really interchangeable.

Answer 2

Utility is the power of satisfaction or the satisfying power of any good but satisfaction is the end of utility of a good, i.e., when a good that has satisfying power is consumed, that power of satisfaction ends in consumption. This ending of utility or satisfying power of a good is called satisfaction

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