Plum switches are 10 grams lighter than abko boards (45g vs 35g).
Not sure the word for it but the switches on the abko boards are on top of the plate / case where this plum board has the switches / caps resting a bit underneath. Abko boards do not have removable cables because of waterproofing.
If you're going just stock and no dome replacements then I recommend going with an abko board. I think it feels better stock than a plum.