Here are some differences the monstar version of game of flags has to the original
Difference 1: etheria is A LOT more bitchy due to her in-laws being monsters while they are more civil
Difference 2: toffee is more polite than river (that is obvious) and tries to be polite to etheria who is having none of it. he also eats neatly and gives moon an affectionate squeeze on the hand when things get troublesome
Difference 3: the episode ends differntly. instead of marco winning, etheria tells star that she si an abomination who isn't worthy of being a butterfly. toffee then gives her a calm but scorching "the reason you suck speech" and moon tells her aunt that if she hates family gatherings so much, she will no longer invite her.