As i am shopping online for a Mini 4 with WiFi + Cellular, I am seeing many different models. The A1550, the MNWQ2LL/A, and the MK882LL/A and so on. Very confusing but I know that there has to be a reason such as the amount of memory or RAM etc,, What I am looking for is a Mini 4 with cellular and the A8 processor with 2GB of RAM. The ROM storage is not that important as I mainly am going to use this iPad for flying my DJI Spark drone. The DJI Go 4 app apparently needs the best processor and highest RAM that I can get. I thought at first that the A1550 was the way to go but now I am confused on which one will best suit my needs. Would someone please point me towards my best choice or would any of these models fit the bill? Thanks in advance for any help on this.