The catalytic converter is just like a muffler...in fact the "cat" is inside the stock harley muffler. They usually have something stamped on the muffler itself to indicate that it has the "cat" inside.
In this picture, you can see that the 'cat' is in there ... I cut one open to see what it looked like.. the 'cat' is the fat thing on the right. the pipe with the holes in it, is the inner 'baffle' sort of....
the charcoal canister is a charcoal canister,,,, it filters out the raw fuel that evaporates from your carb, or fuel tank ... has nothing to do with the 'cat'. But I think you know that part.
Charcoal Canister = intake system
Catalytic Converter = exhaust System