Ok, guys, help me out. My wife is due for an upgrade this year and her biggest focus is the camera (kids & all). How do I explain the differences between the cameras on the XS & XR? I get that the XS has the dual lens and the XR is missing the "telephoto" lens, but what does that mean in practical terms? Sounds like both phones and do the Portrait mode that was previously limited to the X. Both also have the new stuff (Smart HDR, Depth Control) and both have image stabilization. It does look like the XR doesn't have the optical zoom. So, how much better is the XS camera over the XR?