I am not familiar with the OG UI/UX but I suspect its pretty close. I mean its ok, it doesn't blow me away but then again I am fickle and change devices routinely. I can say its smooth, runs well and has a great display. I do look forward to the offerings later in the year and what will be coming down the line, GN3 and others in the phablet arena. Too bad Google is dead set on not releasing anything Phablet wise for the Nexus, could you imagine what that would be like. I don't see why they don't have Samsung offer up a GN3 32GB Nexus Developer Edition like they are with the S4.