I personally don't think there are any benefits to a raw hide; they're expensive and they tear easy.

What I like to use are Firehouse Tugs by O'Brien's Supply. (Although I ask them to send me a tug that has not been painted or dyed.)

Firehouse Tugs last 10x as long as any hide ... and are more reflected of a dog having "something" in his mouth than a flat hide IMO ...

Jack