Nonnie, what a wonderful ask! These two are insanely protective of their family and loved ones. Their main difference is how they chose to protect them and what comes with it.
Leo: Cold. Internal. Carries great love and affection but shows it sporadically, on in private and during special, special occasions. He can nag because he’s a mom, but he doesn’t get overbearing unless the situation calls for it. When he’s made his mind, it’s 99.999% impossible to sway him otherwise. He doesn’t tail his friend/loved one when they’re going out, but he’d call them from beginning to end, ensuring they’ve made it to point A to point B. He will trail them if he feels the need to, and it’s going to take some work to make him feel he doesn’t have to. He’d be a gentleman over and over, but there’s this slight distance from, unlike his brothers. So any precious, cherished moment happens between closed doors.
And most importantly? Letting go. Leo can let go. It’s a terrible, painful choice, and he’ll make it. He’ll take the hard path when he has to, despite everything, and he’ll live with his choice, reassured he made the right one. Leo’s able of making hard choices, not just letting go but other things that may require great sacrifice on any side-making sure the family is safe/intact.
Raph: Hot. External. He wears his emotions on his sleeve. It’s easy to guess how Raph’s feeling at the moment, but what is the second problem, it’s pulling teeth when trying to get him to confront his emotions properly (I think he and Leo have that in common). Like Leo precious acts of intimacy happen behind closed doors, but Raph, unlike Leo, is open to traditional public displays of affection. He isn’t a nagger; he’ll watch silently until he can’t anymore and will burst in emotion about how worried he is. Depending on the reaction, he’ll other break in tears or in anger, usually the latter. He cares too much and too strongly, and the thing about him is that he’s got a huge Hero complex. Leo wants to protect family; Raph wants to protect family and innocents. He’s the type to follow a friend making sure they’re home safely, and yes, he’ll swing it in his nightly routine. Raph’s the hang guy; he’ll joke, play around to an extent. Chilling with Raph is much easier than Leo.
Raph can’t let go. He’ll never let go, and crazily enough, won’t give up. He can’t make the hard choice immediately, and will only reluctantly, with great pain, do so much later when it’s nearly too late or sometimes too late. His decision will haunt him for the rest of his life. With his emotion, he’d try to interfere in their lives, but would stumble over himself, is less clear than Leo. His emotions overpower him, when he’s trying to convey them, and sometimes he can’t get his feelings across. He’d watch them from the shadows, forever vigilant, although he’s the one trying not be emotional.
They feel deeply, and will protect what is theirs. Their love is absolute; their protection is endless. But where one will maintain their sight, the other will be blinded.