I have asked myself that question and without hesitation the answer is Bear. Les tends towards some dark moods and that's the last thing I want to be around in a survival situation. Plus I think Bear has a more extensive knowledge of survival skills. That said I have great respect for Les Stroud's skills. He is no slouch by any means.
Tonight's show was filmed about 10 miles from me in Little River Canyon here in Alabama. It features him toughing it out in the canyon. He fights the cold and a wild boar... but he goes on and on about Alligators. There is NO gators within 400 miles of here, especially in the hills of Northeast Bama.
I was really disappointed in how fake his show was.