Yeah. Harry making the decision not to let the mirror world's unhappiness contaminate his own happiness is something that would have been impossible for him earlier in the story.

The other Harry retreated behind that extreme need to spare other people pain that Harry had earlier in IGYAWM- where he would rather go to therapy, an experience he found painful and humiliating, than tell Ginny to fuck off.

Harry and Draco have their arguments in this world, that's certain.