The Sony A77 II provides an upgrade pretty much across the board compared to the original "Mark I" model, especially with regards to the sensor, image processor and autofocus system. Other tweaks ...
the K-3, as well as against several enthusiast interchangeable lens cameras at similar price points or in similar categories: the Canon 70D, Nikon D7200, Olympus E-M5 II and Sony A77 II.