It may very well be the scheme differences too...

While it seems noticably smaller in some of the pics, in person the difference is harder to tell...

I took the following measurements as a comparison which actually show the BME Edge to be larger in most cases:

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I measured both Edges from tip of rudder to front of cowl :

The WH Edge is approx. 73.5"

The BME is approx: 75"

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The widest point on the cowl on the WH is 9" and the BME is 9.5"

The width at the front former on the WH is 8.5" and the BME is 9"

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The stabs at their largest dimension:

WH is 15 1/8" wide by 11" deep

BME is 15" wide by 11.75" deep