1.8k in teamgames is just sitting there and having decent eco without dying
being better than that is recognizing when good macro isn’t enough to win the game and you need to actually have an impact on game state.
So in other words, 1.8k is reached by making better players on your team able to ignore you as a concern in the game state (playing smart), 1.8k+ is reached by impacting the game state positively (actually taking productive risks).