A stern rudder is just a low brace moved backwards. What I discribed is a stern rudder with some bracing component thrown in. I don't consider the two things to be seperate skills. They are components of the same skill and often merge into one move.
A Duffek, high brace and roll are similar in that way. They can merge together. You can roll up, hold a high brace and merge it into a Duffek all in one continuous motion. To get off a wave after being flipped for example.
>I don't understand why one would be hanging on any brace to steer a kayak. The proper application would be a stern rudder. If you are hanging on a brace, you are in effect slowing the kayak down, not steering it. I find the transition from a stern rudder to a low brace to be lightning quick as it is simply a matter of sweeping forward from the rudder on the backside of the paddle blade. From there you have the option of a conversion to the high brace which should be employed mid-chest high with knuckles up and elbows down.