Why are Bully Sticks good for dogs, but rawhide isn't?

I know rawhide has some chemicals, but I thought the main thing that's bad about rawhide is how it can get jammed in a dog's intestines. Someone said it can do this because it gets so wet and gummy after it's been chewed.

So...bully sticks *also* get wet and gummy when they get chewed. Why are they still considered healthy and safe, but rawhide isn't when it seems to have the same physical characteristics?