It is not good to sell the same Brand and same Model device with different specifications in two different countries, this will reduce the trust on the companies when people come to know about differences.
"...this decision "optimizes" the Galaxy S3 for peak performance on America 's 4G and LTE networks."
A dual-core processor would work better than a quad-core on 4G? Some more information on 2-core vs. 4-core processors might help in understanding what makes a dual-core to work better than a quad-core on 4G.
True...browsing through 21 pages needs lots of patient & time. But I think you have not missed much as the useful information are captured in the first two pages. Other pages show the photos of the teardown step by step.