It is obvious why 'no God' is simpler than God! God is an enormously complex construct! no god is simple....
I think i may be doing a diservice to ockum....maybe i arranged his razor wrongly it just when you have two possiblities it is always more likely the simpler of the two is the truth....tis true you cannot prove a negative
the Whole God question is infact 'unfalsifible' ie cant be proved false; and by the same token cant be proved true either...