Open the messaging app, little difference between a galaxy s1 and s4, In fact zero at first glance. Open settings, notice the same cartoonish icons? Look at the icons, they are the same (except for the colored back grounds on galaxy s1 in froyo, which were removed in GB update). The power toggles. The gallery. Email. Status bar. Status bar icons. Radios and buttons (notice the sharp rectangular buttons? Which never changed?) A co worker yesterday told me he switched from his iPhone to the galaxy s4 because "the UI has been the same old with minor changes and feature additions". But looking at touchwiz history, isn't it similar? I am amazed at this. (Disclaimer: this is not in favor of ios btw, which I consider to be horrible compared to stock jellybean or sense 5 jellybean in my opinion).