Hard to explain what rationale/factors influence the decisions of most here.
I do have a hint though albeit controversial. . . So won't be saying what.
However, lets put somethings into consideration.
Its easy for anyone to say, Oh! look Neymar played more games.
Well if that's the case Ronaldo played less games than Messi and scored more goals.
However, Messi is the better player. So that's not even a credible argument.
Judging by the stats below, without an iota of a doubt it is apparently obvious Neymar had a better season!
Suarez's stats getting dwarfed here.