hollowfication- when a shinigami dons their hollow powers. they become a gray not of the white or black that is hollows and shinigamis. this makes sense to me because the person doing this embraces all the power they can.
shinigamification- when a hollow seals there power into a zanpakuto. this doesnt make sense to me. they do not truly embrace the shinigami side of power. they do not have the abilty of a bankai or even shikai. they still are of a hollows hue albeit in a different shade.
lets do some math
h-ification: 2(shinigami) plus 2(hollow) equals 4(vizard)
s-ification: 2 (hollow) minus 2 (sealing) plus 2 (resurrection) equal still 2.
the hogyoku doesn't look as though it dissolves the boundaries completely... because regardless of who its used on that being still takes preference to one side...
ichigo seems to be the only one capable of becoming a true gray.....