Firmware DJI s900

Hi there,

Im a complete noob to the Pixhawk and I am doing some research on flying a DJI s900 with a Pixhawk.
Now I have just 2 questions:

  • Should I pick the Pixhawk 1 or 2 ( is there a big difference? )
  • What firmware do I choose (I am quessing stable-PX4-hexacopter, but I have no information to back this up)

I hope someone could give some information, would really help me out.

Thanks in advanced!