The Verge are legit, the device will look exactly the same-with a home button-as the international model. Outside of the T-Mobile branding on the back cover, you wouldn't be able to tell the difference between this phone and the international model.
But will there be any changes within the carriers in the States? Last year, T-Mobile and Sprint carried variants of the Samsung Galaxy S II with a 4.52 display. AT&T's model was equipped with a 4.3 inch screen. Additionally, both AT&T and Sprint (whose model also had a 4.52 inch screen) had versions of the phone powered by a dual-core Exynos processor while T-Mobile's model had a dual-core Qualcomm Snapdragon under the hood.
If we can go by the lack of change seen in the international model of the Samsung Galaxy S III and the purported T-Mobile model, there might just be one look for the device globally. Speculation is that T-Mobile will be launching the Samsung Galaxy S III on June 20th.
source: TheVerge via AndroidCentral