Outside of whatever processing the iPhone's built in camera app does, no alterations have been made to either image. In the non-HDR image you notice the poor white balance, but in the HDR image the white balance does seem better, at least to my eyes. You can clearly see that a lot of detail has been recovered in the HDR image, specifically in the bright area on the right, which in the non-HDR image is totally blown out. On the shadow side, you can see more detail in the lens in the HDR image. The side effect of the HDR effect is slightly more noise, but no loss of fine detail, at least from what I can see.