I make a bunch of 4" bladed knives. The Ladyfinger, Guardless Ladyfinger, Bushfinger, Bushcrafter, Arete, KPH, Shank, KE Bushie (3.9" blade actually), are all 4" long with a 4.5" handle. They are all pretty different after that.
The Bushcrafter has more belly, and the handle terminates differently than the Bushfinger. The point on the Bushfinger is very pointy. Thats what gives that knife a lot of its sex appeal. The idea actually came from making a cross between a Ladyfinger and a Bushcrafter. Ladyfinger kind of handle termination, and a more pointy blade like the Ladyfinger, but with a more but with a wider blade with a bit of belly from the Bushie. The two models, BF and BC, are the same width edge to spine. As to beefy, they are all made from the same basic steel thicknesses. The BC has more meat at the tip though.