Princess Serenity has much longer hair in the manga as stated in act. 9. In the old show it looked like Princess Serenity in flashbacks had a slightly longer hair. In Crystal her hair looked longer as well. Neo Queen Serenity has visibly longer hair in manga, 90s and Crystal. The hair color is a lot more inconsistent. I always thought her hair was silver in the past and future in the manga while blonde as Usagi. Crystal was unfortunately very inconsistence - once it looked like Princess Serenity's hair was lighter blond then just like Usagi's. As for NQS she was silver haired in season 2, very light blinde in episode 1 and then blonde in her other appearences...