It's a cool show. Cody is part of the "become one with nature to survive" group. Dave on the other hand, is ARMY all the way. Kick ass and move on. Obviously both schools will get it done.
I like Cody because he can survive with the absolute bare minimums... Heck, he doesn't wear shoes. EVER. Even in the Artic episode he didn't wear shoes, just socks. No fancy gear at all. He reminds me of an Apache, able to live off the country with just his mind, hands, and knife. Old school survival.
Dave is able to survive as well, but he needs modern equipment to be more proficient in doing it. Boots, backpack, etc. I've not been in the military, but I have several friends who have. I think the biggest mistake the military makes in survival training is stressing the need to be properly "prepared". You have to have the full compliment of survival gear to make it. A 40lb ALICE pack of gear is "needed" to survive. That kind of defeats the mental part of survival from the beginning, IMO.