I would have gone for the Ipad 2017 with the more powerful CPU, DJI Go 4 in the current versions are very cpu intensive so overtime I would expect the mini 4 will be outpaced
I defiantly understand your side; but also, these two tablets are discontinued and are BOTH under $300 brand new.
I just wanted to get the more 'tested' model & the model that is on the (official) DJI Approved device list.