Are they the same thing, but one is just a block and the other is in pencil shape? Or is there another difference between the two?
I enjoy using an alum block every shave, and will always use one on a weeper with a little more direct pressure and time. I've had great success with this.
I dread using a styptic pencil. Stings way to much and leaves the white residue (but it does stop the bleeding...).
After I apply a styptic pencil I let it dry then dab with a wet cloth. It removes the white residue.
I've found that white residue a lot easier to remove than a toilet paper square.
Also, alum makes a better deodorant than a styptic pencil.