The BK-7, hands down. More versatile, stronger than a Bushranger, better overall design for a combat knife. The handles are superb, and if they ever got ruined for explosion etc., you have a full tang underneath, and can cordwrap a handle, aka Strider, and keep going. That knife was designed by Ethan Becker with EXTENSIVE input and feedback from spec ops soldiers of many genereations. The goal was to replace the old USMC/Fihghting Utility knife with a stronger knife, while retaining most of the capabilities of the old blade -- especially keeping the blade light in weight. Keeping it light weight was the most often repeated feature soldiers requested.
The 0176-C steel holds an edge forever, and blows away Carbon V, which is just 1095 disguised under Lynn Thompson's advertising. Carbon V is not a proprietary steel, Carbon V is just a proprietary name for the 1095 steel. Now, don't ge me wrong -- I love my CS Recon Tanto, but if forced to choose between the two, the BK-7 is the one I feel would more likely help me stay alive, and hold up under field conditions. I trusted my Becker Brute, with same steel and same handles, in very harsh conditions in the remotest Idaho wilderness last year, and it kicked butt all the way.
The CS Recon Tanto is still a good blade, and is a stronger prybar, becuase of the blade thickness. If forced to choose one knife from the CS lineup to take into the field, the RT would be my choice. But the BK-7 has hit on that magic mix of "slightly thinner blade profile" v. "strength."
Best,
Brian.