Base does not appear to have lane assist or blind spot detection which is added in the mid package. High includes forward sensing, which I assume is the equivalent of a backup sensor, but for the front. Lux includes auto-cruise and evasive steering assist.
Accessories are one thing, core parts like interiors and roofs are a completely different beast. Building hype by showing off white roofs and specific interiors, then not having those available to order is where frustration builds. I want to be able to order the Bronco I want and not have to...