yes, kief hash is pretty good hash. and yes, there is places that use giant sifters. thats how those giant, shitty, bricks of black hash you commonly see are made and sold for the same price, or less than weed.. its 50% low thc trics and 50% powderized plant material, made with lots of heat to half melt it and turn it into a black/brown ball that creates ash when smoked and doesnt taste very good, nor is it very potent. smoke a gram easily.. a nice hash is one that barely creates any ash, has a nice blonde color to it, and preferably melts
how do you plan on smoking that hash ball? the only benefit I find of packing it rock hard is for transportation, or smoking it on the blades, maybe even dabbing might work? otherwise it will smoke way better in a bowl if its busted up finely IMO. so im taking a powder, turning it into a solid ball, then powderizing it again otherwise it smokes like shit... I prefer to just leave it as kief and smoke that, or mix it 50/50 with weed and do stuff with it (oil, joins, bong, etc..)
but yeah, its pretty much the same as "regular hash" hash is all the same... some is better/purer than others.