CEF Chaplain Cap and Collar Badge Insignia Types

[TheMadBaron]

As a novice CEF badge collector who has a particular interest in chaplains, could someone possibly enlighten me as to the difference between these particular badges? I have the Charlton guide, but outside of somewhat antiquated pricing, the entries aren't particularly edifying. I have found period photos of both types in wear on caps and collars during the First World War, but beyond that... Any assistance is greatly appreciated.