I got the cross of iron in July 2015 so it might be the same one. If it starts out with a MASSIVE katyusha barrage against a German defensive line anchored by 2 platoons of Tiger 1's, its the same. Where did you get the other ones?
Easiest way is open up a blank map in the editor and paint a few square of each terrain type. Label them and then study them. Easier to see the difference when they are side by side.
Experience teaches best.
No one has commented on it but you do have the choice of doing real time or we go. I always choose we go. Some others like RT. Too much to try to remember if it gets above company level.