No, that would be the difference between pre-2011 undeveloped Glutenovic and 2011+ polished gluten-free Djokovic.
Well, you can look at it that way but Djokovic won so many 'things' from 2007 before 2011. Do I need to remind you?
Djokovic was not 'underdeveloped' even in 2016. He ended up as what, I can't remember, I think #16 at the end of 20016 if I remember correctly. He was only 18 or 19yo.