I have some soaps that I like and some that I do not. I am not a cream person, I prefer soaps and shave sticks. I like VDH which is glycerin and Arko which is tallow. Why are they different? What are they? Does one work better than another or is it simply choice? I am referring to Glycerin and tallow, not to VDH and Arko in general. Thanks for the help.