Comparer vs. Comparator

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Difference Between Comparer and Comparator
Comparernoun
One who, or that which, compares.
Comparatornoun
Any device for comparing a physical property of two objects, or an object with a standard.
Comparatornoun
An electronic device that compares two voltages, currents or streams of data.
Comparatornoun
(law) anything that serves comparison
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