This depends on your own requirements from the AI Box and what you want it to do.  Most people want to playback video media of their own or stream movies from apps like YouTube, Amazon Prime Video and Disney+ to the AI Box onto your CarPlay. Most AI Boxes are able to do simple video streaming and media playback, however many do this is a clunky basic way due to the speed of the hardware inside them. I would go for an AI Box with at least 4GB of RAM and as much storage as you think you will need for newly installed Android apps and any content you wish to download to the AI Box. If you want a fast user experience that handles more multi-tasking of Android apps, look for an AI Box with a QualComm 665 or 6125 processor inside. Most AI Boxes still come with QC450 chips which are quick underpowered for fast navigating, multitasking and high intensive apps.