No, of course not. 
Target Fix means nothing and gets delayed all the time. Unreal Engine Issues and Bug Tracker (UE-81611)
Here is a video with comparison. On an iPadPro11 the problem can be seen better.
Besides the blocky tearing, the frame rate also does not seem as smooth it should be.
The video compression makes it a bit blurry (effect is stronger on an actual retina device) but it still can be seen.
Video: Unreal Engine 4 Bug in ARKit
