Currently Being ModeratedNov 21, 2012 9:01 PM (in response to lvmedic3214)
Actually, they don't have the same OS. But that aside it is simply a matter of arithmetic and the counting base
The base used for marketing is Base 10 where a GB = 1,000,000,000 bytes.
The base used in the computer is Base 2 where a GB = 1,073,741,824 bytes.
The ratio of the two is 0.93132. So if you multiply 64 GBs by 0.93132 you get 59.6; 16 GBs goes to 14.9 GBs; and 32 is 29.8 GBs. This is the capacity of the storage prior to installing iOS and default apps.