One question: As far as I know it should not make a difference if both players agree that a game is over and count stones or if both keep on playing.

Am I right, that the passing rule is making a difference here, as in otb games there is no "passing" and a player would be forced to play a stone which will be automatically dead or diminuish his own territory if he refuses to accept that a game has ended or that a certain group of his stones is dead, while on Brainking he could just pass?

I hope I made myself clear, seem to have some difficulties with the english language today