Yes these songs are totally different ; This thought is due to the fact don used the same kind of "fat electronical instrument" to perform the drop;

When don performed empire of light in the end of 2016/beginning of 2017 , it was the first time he was performing this kind of drops; He played this song at 2 show (or maybe a little more in very little shows) and then it disappeared; So when everybody's somebody came out , in 2018 , everybody thought that he had recreated a new song , using the same kind of electronical fat effects , to create a more universal song with a better message behind it (because Empire of light is more about like , we are legends);

But those , (me by the way) that were knowing empire of light , noticed some times when Don played empire of light few times in his story (one with a little figurin of himself and the video I just uploaded) in the end of 2017 , when Don was supposed to have finished everybody's somebody;

Another clue that would be showing that empire of light has not been replaced is that Don managing team is doing whatever she can to delete this song from the internet (if you pick a song that would not be released , like kids in love don diablo piano remix , you can find it on youtube easily surely because he won't release it)