Yes, it is hard to write two different perspectives, especially since I write them from alternating points of view. Sometimes one character has a ton of things going on and the other character doesn't. For me, it takes a lot of thought and planning to get the plot beats and emotional beats to match up for the characters.
Almost every time I finish writing a story, I tell myself that I'll just write one point of view next time, but then when I start a new story, I can't help writing two.
While it can be difficult, I absolutely love writing the alternating POV's.