So up until this point I've been progressing steadily. My last shave was closer, was SAS and had next to no irritation. I was using a 1/2 hollow at the time. Today's shave was with a Spike and over time, it looks to be honed down to a near wedge; if not to a full wedge. Today's shave was DFS in most places but I paid for it. The alum never lies. I tried to take my time, more than average, because I don't have a lot of time with this particular razor. What is the difference between these to grinds? Is this a matter of preference/some grinds are more face friendly than others?