Sony Mobile has used different display panels in previous Xperia smartphones and the practice has continued with its Japanese model, the Xperia Z1 f (aka Xperia Z1 mini). Sony is using two different display panel manufacturers: Japan Display Inc (JDI) and AU Optronics (AUO). From a number of images we’ve seen comparing both, it does seem that there is quite a difference between though, especially in terms of brightness.
The pictures below show both handsets side-by-side, where you can get a good idea of brightness and viewing angles. The yellow phone is using a JDI display , whilst the white phone is using a AUO display. Both were turned to maximum brightness with automatic adjustment turned off.
Looking at the pictures, the Xperia Z1 f using the JDI panel appears to much brighter versus the handset using the AUO panel. The AUO panel also appears to suffer when viewing the phone from an angle. We just hope such a display lottery doesn’t exist when Sony announces the Xperia Z1 mini later today.