every picture has whats called exif info. unless you strip it it tells you what camera was used. when it was taken. the shutter speed. the iso. the fstop and a bunch of other things. i have an exif viewer so i can just right click on pictures and unless the data is stripped it will tell me. it helps when some one posts up a picture and they don't remember settings they used or if the person has a point and shoot you can sorta tell them what to do.
i'd take the picture over. even with a point and shoot it'll look better than the iphone shot. also you won't have to clone anyone out.