Chas posts "Notice that both the crest and the motto are substantially different".

Chas
Just to clarify “DIA ’S NAOMH AINDREA” translated 'God and St Andrew' is an addition to the overall Coat of Arms of the Chief of Keppoch and not merely the clan badge. It appears on the Coat of Arms in addition to the chosen clan motto 'Air Muir's Air Tir'.