My girl friend is using sony Xperia E4 and I am using Sony Xperia E3. The have some difference between them but the quality performance is more better of sony Xperia E3 then sony Xperia E4 .
Sony Xperia E4 get hang very easily and the performance is very bad she had to service center 3 time but it is same after some time. Its only have the camera quality , display is also lighter then sony Xperia E3.
And the storage and ram