Mill Vs. Bentham

In what ways did John Stuart Mill's version of utilitarianism differ from that of Jeremy Bentham? Which do you consider preferable?

The Cambridge International Dictionary of English defines utilitarianism as "the system of thought which states that the best action or decision in a particular situation is the one which most benefits the most people". This is the main idea of the system of thought and it is from this the beliefs and opinions of John Stuart Mill (1806 - 1873), Jeremy Bentham (1748 - 1832) and other early utilitarians were developed. Jeremy Bentham, a friend of J. S. Mill's father and the mentor of J. S. Mill, is usually considered the founder of British utilitarianism. J. S. Mill adapted Bentham's ideas and philosophies to meet the criticism utilitarianism encountered in Victorian times, expressing his version in the essays Utilitarianism (1861) and On Liberty (1859). Although the differences between the ideas of Bentham and Mill are very few, Mill's adjustments are important