Choose between ArduPilot or PX4 for Bixler 3

Hi all!
I want to set up pixhawk 4 on Bixler 3. For hobby purposes, FPV.
Please help with the choice between ArduPilot and PX4 and configuration.
As I understand from the forum, the ArduPilot works better with the wind.
The terrain is mountainous and quite often a strong wind.
Of course, I will choose windless days for flying, but completely windless weather is unlikely, most likely I will fly in a gentle breeze (3-5 m/s).
I would also like to be able to set up spare places for landing in automatic mode, in case the model blows off and it is physically unable to return to the start site against the wind.
It is also important that in case of a signal loss, a Return to Launch will take into account the terrain relief, if possible, i.e. do not fly directly on the rocks, but first fly away from the slope and gain altitude in a safe place.
I tried Bixler 3 in the full manual mode, it showed itself well.
Probably also I need to put the airspeed sensor. Can you recommend which one?
And the main question: Ardupilot or PX4 and which version is better to use, how to configure under Bixler 3?

Thanks in advance!

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