Hot Supernatural take in the year 2024: Sam and Dean both have queer subtext/allegory in their characters, but Dean's is like almost entirely wrapped up in his relationship with Castiel, whereas Sam's queer subtext/allegory is deeply baked into the foundations of the character. If you take Castiel out of the show, Dean is exceptionally straight, whereas Sam's queer subtext is rooted in him as a character and not in any given relationship with another character.