In the rave of the moment, you would expect no other OS running on those devices except the Android OS. They both run the Android 4.3 Jellybean OS.
Both smart android devices have front-facing stereo speakers and IPS displays (1280 x 800 for the tablet and 1280 x 720 for the phablet) for better viewing angles. Front (5 megapixels) and back (2 megapixels) cameras are also built-in, as expected of any device today.
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But for now, the devices would be firstly made available to the Indian market by February before other possible regions would be tasted.