I believe it's just personal preference.
Growing up, we used washcloths and soap.
Then I grew up and used liquid soap and loofa (or net scrubbie thing) and sometimes I'll use just my hands and a bar of soap.
For me, it depends on how dirty I am and how long I have to spend in the shower. *shrug* I use different cleansing agents on my body than I do my face.
My husband uses the same bar of soap for everything. lol Needless to say, we have different soaps, scrubbies and all that.
I don't think there's a right or a wrong as far as what to use to get clean....