The Samsung Epic 4G Touch is the only one of the models offered by T-Mobile and AT&T to include both the dual-core Exynos processor and the large 4.52 inch display. While the T-Mobile version of the Samsung Galaxy S II had the same 4.52 inch screen, under the hood it featured a dual-core Qualcomm Snapdragon processor. The AT&T variant matched the Epic 4G Touch under the hood, but had a smaller 4.3 inch screen.
This year, all four major carriers including Verizon will be receiving the 16GB Marble White and Pebble Blue Samsung Galaxy S III and Verizon, Sprint and T-Mobile will have the 32GB unit in both colors to sell to customers. For reasons unknown, AT&T is not going to have the 32GB model to sell, and it also will be getting an exclusive red color. All four carriers will be selling the 16GB model for $199.99 with a signed 2-year pact, while the 32GB version will be $249.99 on contract.
source: TechnoBuffalo via Phandroid