yep that would be a feat to see if someone tried it
by design and structurally impossible without extensive modifications which would cost more than the mast is worth and most importantly would most certainly not be recommended or approved by the manufacturer.
If your desire to swap masts are based around changing height or operating arrangements there are probably options available to achieve whatever goals you are wanting to achieve.
You just need to identify what goals you are trying to achieve on the main truck your wanting to change and see if those options are available for that truck/mast.
But just to be clear:
Based on what the differences between the two trucks mast assemblies are, the RD model is a solid mounted (fixed position) mast with a pentograph reach assy with the tilt and sideshifter built into the carriage mounted on the pentograph which is a design made for narrow aisle trucks, the RC model is a mast mounted on lower pivots (a movable position mast) and has tilt cylinders used for mounting and tilting and has no reach option, the design is more off the base of a conventional warehouse truck design.
The only similarity between the two trucks is they both are designed for stand up operation, but one clearly has an advantage over the other with the reach option and can actually maneuver in tighter spaces (such as narrow aisles between racks) than the other, The RC truck is for more general warehouse operation in open spaces and truck loading and unloading.

But just to repeat what Popeye said, no you cannot swap these masts.