Alright, so you know how Voldemort made Horcruxes? Yes, but how did he make them? Well duh splitting his soul in half. Well, what if I told you some Horcruxes are more powerful than others? Yep, that's right guys gals and nonbinary pals, when Voldemort created the Horcruxes, they got less and less powerful. Let me explain- When he created his first Horcrux while he was tom riddle at age 16, he split his soul in half, 50/50, leaving him with 50% of his soul left. When he made the second Horcrux from Marvolo Gaunt's ring, dividing his soul in half once again this time leaving him with 25% of his soul left, and the other 25% in the ring. When he made the locket into a Horcrux, he once again split his soul in half leaving him with 12.5% of his soul. With Helga Hufflepuff's cup, he split his soul once again, and by that time he was left with 8.75% of his soul. He split his soul in half again when he turned the diadem into a Horcrux leaving him with only 4.375% of his soul left. After that, he was kinda done with Horcruxes by then until he tried to kill Harry, 10 years before the events of the first book, leaving Voldemort with 2.1875% of his soul. And then 13 years later in GoF he split his soul once more as a last attempt to try and save his life before the prophecy was fulfilled, leaving him with a minuscule 1.09375% of his soul left. Therefore, in DH2 Harry had more of Voldemort's soul in him than Voldemort did. And given the fact that in the movie there was a scene where Harry stumbled across a bloody Voldemort fetus, that just shows how small of an amount of his soul was left in Harry. So in conclusion, in DH2 harry was more Voldemort than Voldemort himself.