Baelor and Maekar being two sides of the same coin.
Baelor having black hair and mismatched blue and brown eyes being considered a true prince. Maekar resembling a true Targaryen with silver hair and violet eyes and being the second thought of the kingdom.
Baelor who has spend his whole life being told how to act, what to say and think, always having other's interests first, having the pressure of being the heir of a dynasty in the berge of becoming frail due to the lack of dragons, struggling to show his true emotions, anger or distaste hiding them behind a kind smile and a diplomatic neutral expression, Maekar who spent his years behind his brothers shadow, free to do as he liked, adapting to not having a true place in court, the brother of the future king, being abrasive and harsh to take up space, having his opinions heard.
Baelor who was their mother's favorite.
Baelor who left his wife a widow and Maekar who's wife left him a widow.
Baelor who had to train and educate his son to be the future heir of the legacy that first fell upon him, only to die. Maekar who did not put a single thought on their son's future, who were then kings without any knowledge of how to do it.
Baelor who's son is the favourite contestant of the small folk. Maekar who's son was the most hated of all the contestants by the small folk.
Baelor who lived without his brother first and then died first. Maekar who had never known life without his brother and outlived him.