Stats Discrepancy

According to Sitemeter, KN@PPSTER received 4,449 page views in February.

According to Blogger's stats (which look like they're probably powered by Google Analytics), KN@PPSTER received 16,452 page views in February.

One of these things is not like the other.

One of them is nearly four times as big as the other --  a difference of 429 page views per day.

That bugs me. Not the numbers per se (I haven't been obsessed with traffic much lately, although I never know when I'll suddenly get the bug), but the difference between the numbers.

Anyone have an opinion on which stats package is more reliable?