If you notice the road and its relation in the pictures. Why do you think the road is a lot lower in the second picture? Anyone guessing? My guess is that the iphone 5 was pointed at least 10 to 15 degree higher to get the fringing to try to defemate Apple that it has a cheaper product.
Try to keep the same angle on both cameras and maybe we will believe that you got something. This whole test is invalid. The fringing even though is there it still can be minimized by your cameras angle in relations to the light source. If you show me that you took 50 takes with both camera and 2 degree increments and one camera has no fringing what so ever I will trust your finding but when you show me 2 shots with one obviously pointing more into the sun. You have no claim and your credibility with me just took a nose dive.
Also to you amature photographers out there. How about using your hand as a shield for direct light kinda like you would shield your own eyes from direct sun light would that work to avoid fringe effect. Or sometimes just 1 to 2 degree angle change can make a big difference at getting the effects you want. And you can delete the pictures you don't like. It takes but 10 seconds to take 10 pictures at 10 slightly different angles.
Things are in constant motion towards perfection. The absolute is always moving away as we gain more reality on perfection. As they say perfection as an absolute is unobtainable. But it is always good to try for it and come close.
Its kinda like the fault that has plagued the Samsung Galaxy S2 and 3. And yes before you start ranting I am a devoted Galaxy user
Anyways simply point your camera at a white wall or something and take a photo ... now look in detail at the photo and you will notice a pink spot in he middle (yes they all do this its not just a faulty batch) "working as intended" was the old motto.