I am probably the only one that cared about or noticed this, but the card's effect is mis-described. I was confused in a game on why the card only had an effect of 5 when the difference in our resources was about 30. I realized that the card did not mean "the difference between your resources and your enemy's resources" but instead "#EnemyResources - #Your Resources". So although the difference was 30~, the game calculates it as -30~. I agree with this mechanism, but it would have been nice to have warning.
(I wonder why I can't use a "low priority" option.)