Here a collection of copter where I had installed both:
Quad 650mm 14x8 Props AUW up to 3kg 4S setup:
WKM:
Naza:
Ecilop Quad 700mm 14x8 props AUW up to 3kg; 4S setup
WKM:
Naza:
Hexa 1000mm Props 15x7,5 AUW up to 5,5kg 6Ssetup
WKM:
Naza:
As far as the stability in gusty conditions is concerned, the important points here are the speed of the control loop. In this point both Naza and WKM are not the fastest, but it can be compensated but the correct choice of propellers (pitch>=diameter/2).
I am not sure what "pilot feel" is about, but from my point of view Atti-mode with alt-hold is the opposite of "pilot-feel" if you want more direct response, manual-mode is the correct choice (and I "felt" no difference between WKM and Naza).
If you want a "smooth" yaw, you should change the "servo-speed" in your RC-TX, I have set this to one second, then yaw becomes smooth as silk.
The gimbal on both WKM and Naza can be as smooth a possible, but to get a "smooth" video it is insufficient. (control-loop is too slow using servo driven gimbals, let us see what the BL-gimbals will bring about). The only stabilization system I had in hands that worked (beside the Zenmuse) was the Ecilop, which uses some sort of "physical" stability to overcome the problems of servo-driven gimbals.
The max speed (possible within gps-atti) is dependent on the setup of your system, it is simply the speed the copter takes when the Copter is at max forward angle, again this depends on the props. Of course in manual-mode you can go much faster (if your setup is able to do so).
The "deadband" of throttle can be set up and modified within your RC-Transmitter-Setup (Throttle-Curve). (Until now I did not "feel" a difference).
Never observed a "lip" "when taken outside its comfort zone" and I am using CF-props, and I am flying in gusty conditions. But I can only refer again to the prop setup when flying in gusty conditions.
Summarizing, I am not able to determine a difference when flying, but I have to commit, that all this can be due to the fact, that I am still on 5.08 FW on the WKM.
best regards
Ferdinand