Side By Side Comparison of Sony Xperia Z4 and ZTE Nubia Z9 Max. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Sony Xperia Z4 and ZTE Nubia Z9 Max smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of Sony Xperia Z4 and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.