These are both great. I'm going with the consensus choices.
I must say, while I'm impressed with the iphone, the difference becomes very apparent when you turn your photos into physical objects (print them,) unless youre paying through the nose for your printing or a house like Steidel is publishing your book, (see the book "I, Dubai" for some of the greatest printed iphone photos you could ever imagine.) Otherwise the difference in quality of detail, sharpness contrast and color between a DSLR with large sensor and 16.2 quality mp is undeniable in physical prints. The 5s just can't compare.
None the less, "quality of image," to me, is a far second to immediacy and emotion. If the image or print accurately captures the colors, framing and image the photographer wants then who cares how they compare? These are all just tools to make our work with advantages and disadvantages unique to themselves; they produce different images in their own ways, which isn't to say I'm not utterly curious to see where this tech all goes, but also, I have to tell you, recently I've been going through thousands of photos from 2007 to today that started with my original iphone, and I miss the little camera in that model 3g. I miss that there was no auto focus (I hate autofocus that is slow and tempermental.) I miss that that there was no light metering (I'm comfortable using natural light and anticipating how it will affect the image, and I like being surprised when I was wrong,) I loved how it reacted to low light, and was unable to capture movement so when you did capture movement there was this tremendous ghosting that I've never seen in any other images except in xrays. I just love how unique those images look.
As things become more "accurate" for me I find they often become more boring. I don't think accuracy is the be all end all of anything unless it's accuracy of emotion and the moment. So, yes, I find it interesting, but no, I don't think it matters or that the iphone's camera need to somehow emulate a DSLR to be a valuable tool of choice. One day I know it will, but for now I'm happy. I only wish I had the option to occassionally go back to my 3g camera.