Why shold be the same result if one play same day and different if 2 weeks passed?.... the thing is, that the game say:
-ok, new match:
lets choose a scenario, things to use to determine the scenario;
Q, morale, condition, internal % of contribution of every player(if tend to appear more or less) agressiveness of every one, nº of corners/freekicks/penalties (if corect player shoot, oes well, if not, bad), determinant players that will appear and these who will not contribute (so to be substituted)... bonus... there are many, many things and info and variables that can do of one match something completly different to the others... and many things we dont know xD