pc3 vs pc5

[THEMACHINIST]

I was wondering,what is the diferrence between pc 3 and pc5?I know pc5 will do more but what?:confused:

[Blizzard24]

the PC5 has an option for a sensor that will "auto tune" the quad as well as more stages for more detailed fuel settings. The PC5 also runs off the USB while on a PC instead of using a 9volt battery.

The PC5 is about the same price as the PC3 but that doesnt include the Auto tune option which tacks on another $200 to the overall price.