If you are looking for a new Android device, you have a wide choice of handsets from various carriers, each offering a unique experience in hardware and software. The Xperia Z definitely stands out as one of the top Android choices because of its superior features, but the fact that Nexus devices will be the first to receive Android updates, makes the Nexus 4 a choice worth considering. Check out the following detailed video comparison of the Sony Xperia Z and the Google Nexus 4.
The Xperia Z features a 5 inch full HD touch display with a Mobile BRAVIA engine, 16GB of internal storage which can be expanded through microSD, a 13 megapixel camera capable of 1080p HD video capture, a secondary HD camera for video calls and is powered by a 1.5 GHz quad-core Snapdragon S4 processor with 2GB of RAM.
Meanwhile the Nexus 4 features a 4.7 inch HD touch display, up to 16GB of internal storage an 8 megapixel camera capable of 1080p HD video capture and will be powered by a quad-core processor with 2GB of RAM. Additionally you will be the first to receive Android updates as part of the Nexus device advantage.
source – Mobile Burn (YouTube)