Also, Zlatan's league stats are overblown in relation to the others. He's scored 25 goals in 29 games, with 7 penalties. Suarez has scored 28 goals in 25 games, with no penalties. A huge difference. They both have similar assist numbers (11 vs 10) despite Zlatan playing 4 more games.
That's what it looks like quantitatively. Qualitatively, it's all up to the individual person's judgment. Some people like Zlatan's dominating style of play and how he helps out the midfield, others like Suarez's all-action style with dribbles, runs, passes and workrate. It must be noted that despite Ligue 1 historically being a more defensive league, Zlatan does play for by-far the best team whose GD is double that of the 2nd placed team. While Suarez plays for Liverpool.
Ibra has been amazing in the Champions League though, which has to be factored in despite the fact that it can't be held against Suarez. So overall it's a toss-up.
I think Suarez has performed better in the league and I like him more, so I would go for him.