In order of strikers for Juve, it goes like this. (in game, IMO)
Del > Zlatan > Zala > Trez
Why you ask?
Del can dribble, has amazing free kicks, hard shots, fabulous chips.
Ibra can dribble well, great touch, easy to turn with and keep control, strong, meaning he can go through guys, decent lob ability, good finishing.
Zalayeta is faster then Trez, has a more powerful header in the game, not looking at Trez's crazy overrated stats, and just seems to do more on the ball, at least for me, then Trez does.
Then again, I become accustomed to playing with Ibra and Del as starters, while Trez was out for those months, and then like real life, bringing Zala on. But like I said, sometimes Ive scored 4 goals in a game with him on my mate that I always play.
For some Trez works, for me, I prefer others. Ibra and Zala are both big tall, strong guys, with a better non heading finishing ability, and dribble skill.