Survivor man does not drink urine and he does not have a caterer.
He also has the good sense not to pull the kind of stunts that Grylls does that would get himself killed. I’ve also seen Survivor Man pull out when it’s clear he’s endangering himself.
I saw one episode of Grylls in northwest Namibia (Skeleton Coast) and further inland - an area I’ve spent a great deal of time and am quite familiar with. An unaided, unsupplied person is guaranteed to die - no water, not even a blade of grass, no birds, maybe an occasional beetle to eat. Temps range daily from the 30s to over 100, there’s no wood to build a fire, and nothing to build a shelter from. Miles of plains covered with rocks the size of baseballs - no soil, just rocks. Did I mention the wind? Constant 20 or 30 mph so unvarying that every stone is scoured into an aerodynamic shape. A 90 pound Bushman who’s lived off the land all of his life with nothing more than a thong and a stick would die in a week and here’s old Bear Grylls romping along like it was a park. He may have been a squared away commando at some point, now he’s just a fake.