Moderation prescribes less of everything. The doctrine of the mean prescribes the right amount, which in some cases is a great deal — courage is a mean, and the mean for a soldier under fire is not half-bravery. Confusing the two turns a doctrine about calibration into a doctrine about restraint.
Side by side
Aspect
The golden mean
Moderation
Prescribes
The right amount
Less
Can be a lot
Yes
No
Depends on situation
Entirely
No
Universal
No — some acts excluded
Assumed
What each one means
The Golden Mean
The golden mean is the desirable middle between two extremes — too much and too little. In Aristotle's version each character excellence sits at that middle, with the right point set by the situation. In mathematics the same phrase is an old name for the golden ratio.