I think I would pick Bear. 
Haha, C2 picked Bear. At least he had an opinion.... 
If you want an action "reality" show, then Man vs Wild is the way to go.
If you want a survivor show, then watch Survivorman.
Bear RUNS everywhere. He CLIMBS everything. He DRINKS from anything. He EATS conveniently found fresh kills. He BUILDS shelters (not that he uses them). It's all about action.
Check out some Survivorman videos on youtube. There's a couple interviews that explain some of Les' views on that stuff.
Running everywhere wastes energy. If you've seen SM, then you know he might go 4 days without eating. You are burning tons of calories and putting 0 back in. Running is completely the wrong thing to do.
Climbing everything not only wastes the energy, but adds in a safety factor. If you were in a survival situation, you take the LEAST amount of risks involved. A twisted ankle or broken bone could easily mean death.
Drinking everything? If you squeezed the water out of elephant poop to drink.... blegh.... you would loose 100x that much in the diarrhea that will surely follow. And drinking your own pee? Bear takes it straight... Les makes a solar still to get the water out. Pee is like 20% toxins. Thats toxins your body has already filtered and removed. Drinking it straight puts those toxins straight back into the body in a greater concentration.
Eating is never a problem for Bear. There's always a carcass laying around for him to cut up and eat. Funny how they never have rigor mortis. Bear dives right in and cuts out chunks of raw meat. Les talks more about parasites and the dangers of raw. Les cooks about everything he gets, except insects. And what Les gets is usually pretty meager.
Shelters - Well, it's a classic case of what looks good on paper. Bear builds them, and really relies on the lean-to a lot. This is because he's not actually going to be sleeping in it. Les builds shelter to protect himself from the elements. He explains why the lean-to is a poor shelter. Les really has to occupy his shelter, so he obviously spends more time to make it as good as possible.
Bottom line is, there's really no right or wrong answer to the poll. It's what type of entertainment you like more.
Bear "Man vs Wild" Grylls - Action/adventure show about a guy surviving.
Les "Survivorman" Stroud - Real survival show, showing a guy really surviving.
*I might make another poll... "Who would survive an actual survival situation" but I think I know what the overwhelming response would be
