Sony chose not to change the design and it was also strange to use its own Home button instead of putting it on a part of the screen. The XZ1 is solid with metal body, water-proof, dust-proof and Corning Gorilla Glass 5 glass on screen. You can choose 4 colors Moonlit Blue (moonlight blue), Venus Pink (pink), Warm Silver (silver) and Black (black).
The phone is all bigger than its twin, including the battery, except for the 4.6-inch screen and the front camera with only 8MP. This camera can switch between 80 degrees and 120 degrees (can be used in videos) to selfie groups. The XZ1 Compact can reach a maximum download speed of 800Mbps.
It also has water resistant IP65 / 68, Hi-Res Audio, increased resolution of DSEE HX, LDAC, Digital Noise Cancalling and ClearAudio +, but the main difference in design is that instead of metal body, Sony uses fiber Plastic reinforced glass. The colors are also slightly different, including Black (black), White Silver (white silver), Horizon Blue (blue) and Twilight Pink (pink).
Both Xperia XZ1 and Compact are available worldwide from September 2017, both running Android 8.0 Oreo.