Break time.
The problem right now is that Sakura is in distrust mode for Sasuke, which Sasuke got nothing to fix since he's not doing that. Therefore, SS is in red zone. The other problem is that this arc is clearly aiming for Naruto's glory day, rather making both of them, so pretty much the one to get all the glory will be Naruto and only Naruto. Unless Sasuke's birthday is on the same day for whatever reason. Lol. But jokes aside, the point is this is all about Naruto and I'm glad Kishi is doing this route, because regardless many of you said he favors more to Sasuke, I disagree. I can go on why but really this arc tells you the direction it has been portraying for a long time.
That all said the reason I'm addressing this is because if this is all about Naruto, just think the ending of the arc will reward him. Pain Arc clearly shows not only showing mercy to the one who you wanted to kill brings surprises (revival), but how much Naruto is rewarded in the end by his people. Sakura hugging Naruto in front of the village was not needed but it did because this is what Naruto earned and soon it will grow deeper. Why else the atmosphere felt like the moment of a woman waiting for a man to return from the war. I have seen it a dozen of times and this one caught on. After all, the next moment after the hug was the celebration, showing you that love part is always last before the celebration sendoff. It happened in How to Train Your Dragon, which happened to be Kishi's favorite movie. I wonder why.
Now the last part I want to discuss is the possibility difference between Naruto and Sasuke's death. I was recapping in my head during the train ride, and honestly, I feel that losing Naruto will be more effective than losing Sasuke. I think the biggest evidence is no doubt the KN4 incident. When you think about it, Naruto was on verge of killing himself by using Kyuubi, which shows in the aftermath. I think the fact her line, "I'll save Sasuke for you. So please,...." says it all because I get the feeling that's how Yamato reached to the conclusion that she loves him deeply. Not only she took a huge risk on getting near, but the fact she grasped her heart as Kabuto described on how Naruto will end killing himself just to save Sasuke. Also, another evidence is when Naruto didn't get mad at Sai scene. Ok, Sakura said that don't talk bad stuff on Sasuke, but we all assumed it was something about Team 7 or even her love. True on the first one, but that all changes when Naruto actually didn't thrash back at Sai. Sakura didn't hit him because of Naruto. Why? Shouldn't she still hit him because of her as in "That's nice that Naruto didn't hit you, but yeah, you hurt me so pow!" Also, if you go back, when you think about it, Sakura is making herself the person who can be pissed off easily that you don't want to be friend with type of person, instead of Naruto because Naruto was really pissed off in every moment that Sai bashed. So she didn't hit him because of what Naruto said. True, but it's your choice, just hit him. Not only that, but why Naruto stopped you. That's why Sai caught on that Sakura has a hidden feeling with Naruto that she's not aware of. When a person followed indirectly or directly from another person just to stop your grudge, then there is something hidden. To be honest, I can actually go over this, but it will be long and you should ask me if you want to read it.
Now, back to the topic on who will be most effective. Honestly, I see Sasuke's death making her sad as much as Naruto sad for Jiraiya's death. However, I see Naruto's death making her sad as much as Obito sad for Rin's death. No, she won't go bad, but she may become a shell of her self. You may be thinking, "Well, that would be bad." Not necessarily, because it only backs up the idea that her feelings for the guy who died is powerful that death can ruin her. No, she won't be suicidal. Yes, she can move on, but it will be very hard and when it comes to fictional writing, it won't be forever. The point is to address the power of that person's feeling. I won't spoil, but I know where is it from. Examples:
1) The heroine loves the hero in the end, but the hero did something suicidal and she cried hard. 3 months later, she doesn't talk to her boss, rather very fixated on getting stronger, which her first take was to be more human, living normal. Luckily, the hero returns and they have happily ever after.
2) The hero went to do a risky task as he told the heroine he will be ok. He never returns. The heroine is all sad and loses focus. That is until some telepathy stuff (can't say) happens and she was confirmed that he's alive. They talked and later, she fought a strong enemy and won. When they physically reunited, well, it's all tenderness. No, it didn't happen in the end.
3) The hero is on the verge to be in great danger of possible execution for something he was being used. The heroine tried so hard as her old mentor tried to calm her but she was so sad because he was gone and possible that he could end up dead. The mentor realized that she is in love with him. Sounds like Yamato.
So yeah, I can go on, but if you want a clear explanation, feel free to ask. Sorry for the LAP. 
. I think everyone of us has come in those term of events .. 
She's hiding something for a reason and that is not it. She might have an ulterior motive.. maybe, just maybe. But that would be a fun twist.
^^.
, because she love him or at least until otherwise contradicted .
