Knock on edging is a moulding that comes on a roll & “knocks” into a groove routed on the edge of the door. It can’t go around a sharp 90deg bend, so the doors & cutouts are characterised by having radiussed corners. Edge banding is a process where a plastic strip is machine glued to the edge of the timber & trimmed flush to give a clean edge, rather than the lip that protrudes from a knock on edging. It’s a matter of personal taste, but edge banding gives a cleaner look & knock on edging is often seen as an easier cheaper option. Edge banding requires investment in the machinery & tends to appear on higher end conversions.
Like I said, it’s a matter of perception & personal taste before anyone gets upset.
These are edge banded
(isn't that right, 
