Rough Top Layers

stock 3.1 400, Oribiter V2
Hatchbox Black ABS, 100 bed, 250 hotend
0.2 layer height, 5 top layers (pic on printer), 4 looks fairly identical (pic on desk).
Same result in OrcaSlicer and SuperSlicer

Presumably this is extrusion related. Allegedly my flow is good when printing solid pieces, like the calibration pieces, but when printing over infill, you can clearly see the infill pattern through the top layers.
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