I’m not sure is anyone has noticed this, i have just done a quick test on my iPad over the last week, and no two views of my news feed across multiple apps is the same.
This isn’t a criticism its just an observation. it is really interesting that looking at the same News feed across multiple apps looks so different, i was under the impression they all got their output from the Facebook mobile site. Turns out not in every case. Some Apps seem to use an RSS like system from somewhere maybe a direct API?