Not to be argumentative but I do not see a tractor configuration as advantageous…
My reasoning is as follows:
a.) the separation/turbulent flow amplitude cause & effect of the canard/main wing coupled with turbulent flow of the propeller wash is a big question mark.
I would have grave concerns about deep stalling utilizing a tractor prop
b.) I would speculate the pusher configuration will gather the turbulent flow & direct it across the rudder giving an effective rudder control increase @ high AOA

But the question still remains, how big

Please feel free to correct me if I have misspoken or my understanding is incorrect.