they aren't really cheats in the GTA sense on the PC. you are accessing the development console to alter the game world. with GTA you enter a button sequence and you get certain things. with the command console it's almost like altering the code to add or change things in the game.
i dono sounds the same to me lol...people use it the same from what i hear

still, i relize we dont want fallout to begome GTA butcheats have been found in games from medal of honor(the first ps game) to gta and others, just as no cheats have been part of many games, cheats dont make the game good or bad, and i dont really see why some people would make a big deal over them since they are compleatly option.
the diffrence between cheats vs no cheats is this:
no cheats:
go through the game
do all there is
repeat a few times
cheats:
go through the game
do all there is w/o cheats
repeat a few times
repeat again with cheats
its a little boost, not hugely important, but sometimes you just like to mess around with things right?