CF Combat Corporal or Master Corporal ?
 

I am unsure of the rank displayed on the right of the attached pic. I think the one on the left is a Master Corporal but I am confused by the other one. I have been unable to find a reference for it.

Any thoughts ?

The one on the left is indeed the master corporal and the one on the right is the obsolete corporal rank before the removed the maple leaf

NCO Rank insignia online reference
 

As previously stated, the Cpl rank insignia with the top chevron bisected by the maple leaf is an early version of the CF Combat rank. It is actually the second version of corporal's rank for the combat uniform. The first version worn by the Army from 1963 to C1967 was two plain chevrons. The second version with bisected top chevron was worn from C1967 to C1972. The first version was reintroduced and was worn until the adoption of Cadpat.
More info here:
http://mpmuseum.org/securncm1.html