Gerber Fastball runs a 3″ wharncliffe blade in CPM-S30V; Gerber Vital Pocket Folder runs 2.9″ of scalpel in Surgical Stainless. The Gerber Vital Pocket Folder is the lighter of the two by 1.40 oz.
01234567 in
Gerber Fastball · Wharncliffe
3″ blade · 0.11″ spine · 2.7 oz · ~0.9″ tall
Gerber Vital Pocket Folder · Scalpel
2.9″ blade · 1.3 oz · ~0.79″ tall
Spine thickness, same scale
0.11″
Length and spine thickness drawn to true scale from published specs. Outline traced from the maker's side-profile photo.