hard to soft, soft to hard.... palm to skull, fist to body.
that said, however, I don't use palms much.
as for the vertical vs horizontal fist, they are structurally different. Some may say the vertical is more structurally correct. striking surface is a tad different, too.
i'm nobody...i'm nobody. i'm a tramp, a bum, a hobo... a boxcar and a jug of wine... but i'm a straight razor if you get to close to me.
-Charles Manson
I will punch, kick, choke, throw or joint manipulate any nationality equally without predjudice.
- Shonie Carter