As the Xperia X Premium with HDR display is an untestified false news, Sony is still currently working on the development of two new Xperia C smartphones with their specifications and hardware appeared on GFXBench. It is discovered and reported on Xperia Blog where these 2 Xperia C models comes with a codename at F3216 and F3311.
According to the specifications of F3216, the smartphone sports a 4.6 inches Full HD display powered by MediaTek MT6755 octacore processor clocked at 1.9Ghz, 2GB RAM, 16GB ROM, 16MP front camera and 21MP rear camera. It also runs on the current latest Android 6.0 Marshmallow OS.
Another model F311 comes with a 4.6 inches 720p display and powered by MT6735 quad core processor with 2GB RAM, 16GB ROM, 5MP front and 13MP rear camera and runs on Android 6.0.
From the specifications above, it is seems that both smartphone are classed mid-range that might fit in the budget of normal smartphone consumer today.