If those are your only two choices I would take take the Gerber because it was designed for survival. Many SOGs have very pointy tips that are waiting to snap.
As far as using your knife as a spear; never do this, instead sharpen the stick into a spear.

I would suggest considering an Ontario Rat series knife. These are very stury and sharp blades with a simple utilitarian design. I have a RAT 7 and it rocks. Beckers are good too but getting hard to find.
Also look at Doug's fixed blade; can't go wrong with Benchmade IMO.