12 GB and 4 GB refer to the amount of memory and storage. The amount of storage is not directly related to speed. In some cases, a computer may operate rather faster if it has more memory but it does not change the raw processing speed.
Those are capacities, not speeds, which are expressed in "Hertz" for consumers.
iPhone 4, the newest version costs in the US: with contract from AT&T or Verizon 16GB $199, 32 GB $299. unlocked 16GB and 32GB $649. In the UK: unlocked 16GB £510, 32GB £612. O2 Pay as You Go 16GB £504.99, 32GB £609.99. (these are locked to O2) with contract from O2 16GB free to £304.99, 32GB £49.99 to £349.99
16gb, 32gb, 64gb
with contract 16gb=$200 32gb=$300 64gb=$400 without 16gb=$650 32gb=$750 64gb=$850
16gb = £429. 32gb = £499 64gb = £599
they vary from; 16gb - 32gb - 64gb
$199 for a 16GB $299 for a 32GB
16GB and 32GB and 60GB
16gb/32gb/64gb
If you are asking about gigs(gigabytes) it would be either 16 or 32
The iPod touch which is 16GB at Costco is around $200. im getting the iPod touch for 16GB tomorrow and its about 80-90 dollars less than a 32GB iPod touch.
iPad with WiFi: 16GB: $499 32GB: $599 64GB: $699 iPad with WiFi + 3G: 16GB: $629 32GB: $729 64GB: $829 iPhone 4: 8GB: $199: 16GB: $299
32g . you can store more on it.