I'm no engineer, but the differential pinions seem to be attached to two different objects in those pictures.
In the first picture, the "planet pinion" is directly attached to the ring gear, causing it to rotate in relation to the "sun gear." While it's not exactly an orbit, it is a rotation. In the second picture, the differential pinion is attached to the housing, which I assume is stationary. Maybe it is just a different implementation of the same thing, with labels adjusted.
Really, this thread is the equivalent of a man on welfare calling a hobo a drain on society...
- LostCause
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