Well, having one colored item and the rest grey is a fairly common way of making one item stand out in a photo.[1] When you break it down, it's not that creative a photo. They both take a black & white of an area with many iconic buildings, then make a London bus pop out of the background by letting it keep its color.
Item #71 tends to point to this particular case as being deliberate copying, but it's not exactly impossible to get a case like that from independent works when only so many elements were identified as being the same in both. It seems like the crux of the matter is not whether it was edited or not, but whether it was copied with the other photo as a reference or not.
[1] Google doesn't quite understand that as a query, but you can still find many examples of this technique scattered among many irrelevant results:
Item #71 tends to point to this particular case as being deliberate copying, but it's not exactly impossible to get a case like that from independent works when only so many elements were identified as being the same in both. It seems like the crux of the matter is not whether it was edited or not, but whether it was copied with the other photo as a reference or not.
[1] Google doesn't quite understand that as a query, but you can still find many examples of this technique scattered among many irrelevant results:
https://www.google.com/search?q=%22black+and+white%22+photos...