[custom:mwc15] Samsung hasn't just overhauled its smartphone hardware in the new Galaxy S6. The company's TouchWiz UI has also received some much-needed attention. It's much faster than before, with slicker animations and a clear Material Design influence. We've already seen some movement in this direction through the Galaxy S5's Lollipop update, but the differences between the two generations of Samsung UI are pretty striking, even when compared with a fully updated GS5.

We've been playing with the Galaxy S6 here at Mobile World Congress, and we've had a chance to see all the little changes Samsung's made to TouchWiz. Some are major, some are minor; you'll find the more notable ones in our photo essay after the break.

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