Djokovic with post peak Fed still had peak Nadal for some years, and other formidable challengers like Wawrinka, Murray, a level below them guys like Thiem and Medvedev. Federer’s peers all had no idea how to play him at all, only Safin and Nalbandian got close, unfortunately they had a shit work ethic and professionalism.

The answer to this specific question is Djokovic with post-peak Federer because it lasted more years, but overall Djokovic had the stronger competition when you factor in other players such as Nadal, Murray…