Compared to Japanese Rules which most westerners learn, Chinese rules differ primarily in the scoring and include the Super-Ko rule and ofc most if not all bots use Chinese rules for simplicity.
Why simpler? Because playing extra moves while your opponent passes does not modify the score under Chinese rules. This makes it much easier to resolve any disagreement about the final score. My hope is that this reduces the call on Mods and reduces the bad feelings that go with an improperly completed/scored game.
Chinese Rules score the game by physically comparing your share of the board(stones & spaces) with your opponents(Area scoring). Captured stones are not used in scoring. However the score still works out the same(give or take a point) because if, for example, you have captured 10 more stones than your opponent, then you have 10 more stones than they do on the board and these are counted.
A difference of 1 point may occur between the rule sets if black plays both first and last. It is therefor worth filling in the dame(neutral) points or more precisely, worth doing if there are an odd number of them. For example; If there are six neutral points left then you can safely pass but if your opponent takes one of them then you need to respond, reducing the number of neutral points to four.
My belief is that Japanese Rules have evolved from Chinese Rules as a short-cut score estimation method and then the Nihon-Kiin conventions prevent distortion of the score or the need for hypothetical play.