Lamine Yamal has all it takes to win it and the same goes to Démbelé, but the number of votes on each of them will have to determine who the winner is going to be, most likely as am seeing it, Lamine Yamal may be the winner of the Ballon d'Or, but his age factor is something they may consider and how e never won a champions league before, so they may consider Démbelé for it, but anything can change at the cause, we cant predict.
Démbelé is also a great player who deserves to win the award because in terms of quality of player, Démbelé also has the talent that the team needs more so that PSG could win the Champions League last season after Démbelé and his teammates were able to work together quite well. So personally, of course Démbelé is also the best player who deserves it and I also wouldn't be surprised if the number of votes could be more for Démbelé even though Lamine Yamal also has extraordinary talent as a player and that was also seen last season.
If this is about individual display and entertainment with the football, Yamal will win;
If it is about individual ratings at the end of every match, Yamal will win;
But if it is about achievement and trophies, here Dembélé wins.
Also, people will vote this, it seems Yamal is more arrogant than Dembélé, expect people to vote more for Dembélé;
Balloon d'Or organisers have been looking for a way to award it to their own, maybe it will happen this time.