Having used both chademo and supercharging extensively they are totally not the same.
One is 1/3rd the speed of the other in real-world usage.
One is 1/3rd the speed of the other in real-world usage.
I can tell you charging chademo on a Model S is much slower.
As I said elsewhere, the Chademo connector can support higher currents when there is a need. When there are Leafs (and Souls? I think think those are the only two in the US on Chademo) with 200mi range batteries, I'm sure we'll see the existing chargers upgraded to the higher current capability.
I'm not aware of and chademos above 60kw today while Tesla has a while infrastructure deployed right now.