Throwing 8 year old twins separate birthday parties?

I have twin daughters that are turning 8 next month. I usually do their parties together but one of my daughters ends up not liking her party. They are twins but so different. Best way to explain it is for Halloween one of my twins was princess peach, and the other one was her own version of the grim reaper. One of my daughters has always gravitated towards darker things. My husband introduced her to a cartoon show he watched when he was a kid called growing up creepie and also Edgar snd Ellen. She loves stuff like that. Every year we do a princess party and she dislikes it. I just do it because it's easy to throw together and one of my twins loves princesses. But my other one hates them. My husband said we could throw them separate parties. That makes me sad. I know they will want separate parties when they are older, but 8 just feels so young for them to already be separating from each other.

Edit: My husband's idea was one has a party on one weekend the other has it the next.