Emerson CQC-7B runs a 3.3″ tanto blade in 154CM; Emerson CQC-7BW runs 3.27″ of tanto in 154CM. The Emerson CQC-7B is the lighter of the two by 0.12 oz.
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Emerson CQC-7B · Tanto
3.3″ blade · 0.125″ spine · 4.5 oz · ~1.1″ tall
Emerson CQC-7BW · Tanto
3.27″ blade · 0.13″ spine · 4.62 oz · ~1.18″ tall
Spine thickness, same scale
0.125″
0.13″
Length and spine thickness drawn to true scale from published specs. Outline traced from the maker's side-profile photo.