ecto
It has a very specific behaviour: 10 or 12 degrees offset, higher on the left at power - up, fairly stable on both sides, then during taxi hardly any real movement at any side, but several (6 or 8) short instances of left AOA vane reading ramping up a few degrees at a time, not vertically (cliff) but at a slope, increasing the offset to about 25 deg, then at rotation the right one increases (normal) the left one decreases (abnormal) and then both set at 22 degrees offset and seem to measure quite faithfully to each other (apart from the offset) for the rest of the flight.
Your analysis is fundamentally flawed because AOA is not valid before takeoff, and any data points prior to that must be ignored. The AOA sensor relies on significant forward speed to align the vane with the airflow, and this is not possible while taxiing.