[Imp]

Screen resolution offers a massive improvement if you play the game at all regulary that alone is worth buying the CD for. Op fire filter is more usefull in MBT in my view but buy the game you play most first should be your criteria.
Be warned though after you have bought it you will not play the other one till have bought it to as will realise just how bad the graphics were it is after all a 1970s resolution.