A smaller crank pulley on a supercharged engine will cause you to lose boost. The crank is the drive pulley so it is not the same as replacing a sc pulley. A smaller sc pulley will make more boost. But a smaller crank pulley will make less boost and spin the rest of the accessories slower.
Well shit now that I re read I see that you said that like 5 times lol. Well either way, just remember that it will spin your water pump, alternator, power steering and Ac compressor slower. Making them less effective.