How much Commonality is there, as far as peripheral connections, between the APM 2.6 and the Pixhawk? is it a clean swap if i already have APM 2.6 with all the goodies (GPS, telemetry, 3DR Power Module)
does Pixhawk work with Mission Planner, AndroPilot or Droid Planner?
I didn’t say that it’s not a support question in general. I said it’s not a Copter software support question, as you were asking about connections and such. That is hardware and therefore belongs to the hardware support section.
But anyways, all the information you need is in the product description and the documentation of the Pixhawk and the Firmware.