Benchmade 531 Blade difference

[stikboy5411]

So I was looking at my 531 and realized that the butterfly was not quite as dark and prominent as on other benchmades. Well in my search for the truth I realized that the grind of the knife is slightly different depending on which websites you look at. For example, the knife on KnifeCenter.com has a higher grind with none of the butterfly on the "unground" portion, where as on blade hq the grind and logo placement is the same as mine, and REI is somewhere in between the two. Does anyone know the story behind the inconsistence??
KnifeCenter

REI

BladeHQ

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