So I found a video that compares the Internet Speed of 4 Sony high end Flagships as Xperia Z3 Plus, Xperia Z2, Xperia Z1 and Xperia Z. Will Your Desired 4n win. See for yourself. Test was conducted between these smartphones on the same WiFi Network. Results was amazing.
From the 4 smartphones the oldest is Xperia Z which obtained a good download speed while Xperia Z1 obtained simillar scores. The Interesting fact was that the Xperia Z2 obtained a lower internet score than the Xperia Z & Z1. But Xperia Z3+ the latest device obtained the best score some what twice the speed of Xperia Z1. Watch it yourself below