I say this, Part 1 Sakura I don't know why she became a Ninja, Sakura didn't bother to learn any jutsu or even learn taijutsu or anything, in battle she was useless. Heck Sasuke even called out on that Sakura should stop obsessing over him and should focus more on training.
Sakura spend the whole part 1 without even knowing a single jutsu, not even 1 jutsu, only thing Sakura learned was how to dispell genjutsu, nothing else. Sakura became impressive when she asked Tsunade to train her, when she got motivated to get stronger.
Hinata she tried to improve herself in part 1, she maybe weak, she may not have confidence, but she tried to improve. She not a genius like Neji, but shown many growth in Part 1.
Now Part 2 Sakura shown a huge amount of growth I have nothing negative to say about Sakura. Sakura learned so much, she learned Taijutsu, healing which is impressive, Summoning Jutsu, regeneration like Tsunade.
Part 2 Hinata she improved in her jutsu, she gained a lot of confident, she managed to confess to Naruto her love which is a huge character development. Hinata isn't the strongest, but still one of my favorite characters.