if am not mistaken both are the same, function as below
An oil catch can/tanks purpose is to separate and hold (catch) any oil and/or oil vapors from entering the intake or atmosphere through the crank case ventilation system.
The OCT is to catch oil vapour from the PCV valve that's usually routed to the intake manifold / TB.
Breather tank is to ensure coolant it not wasted in a radiator / cooling system. Not exactly sure why you'd need one since we have a overflow reservoir.
Any cikgus can tell why when it rains i can feel water dripping on my toes...some say its the door getah,some says its the daun pisang u know under ur fender above your tyres...hmmm any suggestions to deal with this...