Formula One 2013/2014 Technical Regulation Comparison

Formula One 2014 Technical Regulation Additions Review

3.4.1. Bodywork width ahead of the front wheel centre line must not exceed 1650mm.

This gives the width limit of the front wing. Current front wings may have 1800mm width. (http://www.f1technical.net/articles/11634) Now, 75mm from each side may be taken, which is corresponding to some part of the endplate. This may bring less efficiency of the front wing as the area is shrunken. However,

3.7.5. Ahead of the front wheel centre line and between 750mm and 825mm(originally 840mm) from the car centre line there must be bodywork with a projected area of no less than 95,000mm² in side view. 

This gives more freedom to the shape of the wing. So, FIA definitely want more narrow but larger and more complex front wings.

Moreover,

3.7.5. Any intersection of this bodywork with a lateral vertical plane or a horizontal plane must form one continuous line.

this term means that no many small wings are approved. There should be single front wing.