it is about how you organize one line of your formation.narrow means that there is no space between your players,they are one next to each other.for example let's take the middle line of your formation: let's say you have 3 mc's. narrow means like this ----MC-MC-MC----,and wide means like this MC----MC----MC.as you can see wide means that there's a space between your players on one line.hope i made you understand.
Now there's stg i want to share...i've lost a match between a lower skill leveled formation and i think that 4-3W-3 can be beaten by 4-3N-2W-1...if someone tries please post here the result.