The close up from NFL has a lot more edge detail to my eye that isn't there in the PLP. If I look at the sizes of the JPG (letting an "independent" algorithm work out how much detail it thinks is there with the same number of pixels) the NFL has 417 kB while the PLP has only 162 kB. This is a lot.
Oops - didn't check enough before my last post The JPG files supplied have been coded with different qualities if I can believe the reporting in Irfanview. The numbers were:
PLP face shot - 2560 x 1600 Pixels - 162.23 KB - JPEG, quality: 75
NFL face shot - 2560 x 1600 Pixels - 417.26 KB - JPEG, quality: 90, subsampling OFF
PLP field - 536.55 KB - JPEG, quality: 90, subsampling OFF
NFL field - 619.05 KB - JPEG, quality: 90, subsampling OFF
If I save the NFL face shot at JPEG quality = 75 in Irfanview the file size drops to 187.15 KB. It still looks a lot better than the PLP version, and I suspect that PLP encoded at quality = 90 wouldn't look much different, but the size differences earlier indicated aren't a valid guide. For the same nominal quality JPEG save there does seem more detail in NFL but the difference is more around 15% of file size on this limited number of samples. The encoding picture quality difference may be more.