No doubt. De Bruyne's side
He is the leader, the best player of City.
- one the the first link of their defensive machine through his pressing, a high number of interceptions, a good percentage of tackles won but also duels won... a huge implication.
- The main playmaker, conductor of Guardiola. 15 assists is really good, not far from Henry' 20 assist record. He raises the collective's level and sublimates his teammates especially Sané
- He is also the top point earner (20) so if the title race is done, he deserves a part of the credits. Pretty regular.
Plus, more generally, I am for emphasise the player's Influence on a collective, the way the team plays, and the final victory. Their value more than their stats. That's is the paramount importance of players like Ozil in Germany, Kroos, Iniesta, Kanté... The Ballon d'or kind of forget that only purpose of a player: collective success. And reward Salah will be sticking in that line.
At the end maybe we do see him less on the pitch than Salah because his team is less unbalanced and that the Guardiola/Bielsa game plan is to reduce the individual part for the benefit of the team. But in the title race KDB, and only him, has been the best contributors, more than Salah who also benefits of his teammates work but remains even recently the player who had missed the most PL big chances.
And actually I don't not think that it's easier to perform in a top team...