The Gnus are not canted. They do not make note of baseplate rocker although there does seem to be a very small hint of it on the actual plates. The base of both bindings is aluminimum. In itself you are going to get very little flex there. The highbacks are prettly similar in terms of flex with the Gnu being more uniform over the whole back and Flow using their modback system which isolates the flex into zones which can then be tweaked with different panels (models).