Well, from objective pov, based on reviews PS4 will get much better metascore for its 2 biggest exclusives this year, so based on reviens, PS4 already has thé best rated exclusive this year, goty among exclusives ( dark souls were goty so...)and also a great a rpg game with Dragon Quest Heroes , and other les significant games like Disgaea or Tomorrow Children, but the best one : Persona 5 ( last one has 94 if i remember well ) , thé sequel of thé best rpg ever
So that will make 2 games at +90 , and i dont think Halo or even Forza considering thé méta score of thé previous ones ( i dont really count false exclusives like tomb raider since in 6 months, youll have to take it off from that list ) , i dont think that any of thèm will reach 90
So if we are talking about quality + quantity, PS4 wins easily, X1 will win on software sales though