Can you run a A3 FCU with a single A3 upgrade kit? I see you can run a A3 upgrade kit with the N3 so I assume the the same is true with the A3.
Are there any good comparisons or can someone run through a comparison of the A3 vs N3, it is not evidently clear, other than price, what the real differences between the two controllers are.

Thanks in advance.

You ultimately have to compare product pages. Here is the A 3 controller: https://www.dji.com/a3?site=brandsite&from=nav

Here is the N 3 Controller: https://www.dji.com/n3?site=brandsite&from=nav

They both have their pluses. However, the N 3 can be upgraded with the A3 Controller Upgrade kit.

I appreciate the response but DJI's marketing material does not tell me what the differences are in capabilities. Your marketing department seems to be a little over zealous in reporting capabilities. What do you get for the extra $500 in the A3? Does the firmware have the same capabilities?

Also I asked about using the A3 with one A3 upgrade kit and didn't get a response on that question.

Hello, A3 requires two upgrade kits.
check the N3 FAQ, https://www.dji.com/n3/info#faq ... at the top of the list:
Flight Controller        A3:        Fits any multi-rotor aircraft.  Built-in industrial-grade sensors. Software dampening.
N3:        Fits multi-rotor aircraft up generating moderate levels of vibrations. Built-in consumer-grade sensors with redundant IMUs.  Built-in physical dampeners.