The peerage is the collective term for all those holding titles of nobility of all degrees.
In contrast to the English equivalent, the dignity of baron is a non-peerage rank in the Baronage of Scotland, created in the same way as a peerage with crown charter and is protected by the Abolition of Feudal Tenure etc.
(Scotland) Act 2000 recognised by the crown as a title of nobility with status of minor baron.
The heraldry of Scottish baronies is governed by the court of the Lord Lyon.
In fact, up until 1707 union of Scotland and England, the only difference was that peerage titles were personal honours with strict rules of succession, and baronage titles were free baronies attached to land, and freely assignable, with each new baron requiring a confirmation charter from the crown (up until 1874) to ensure loyalty.