Actor Cary Grant projected the quality of stillness. Yul Brenner projected restraint but not stillness. Yul Brenner had scary emotion within that he reined in; yet it remained palpable, not seen on the surface, like danger.

Cary Grant was different, still all the way through to his core, where a reservoir of emotions were accessible to him, to pick & choose which to allow.

Yul Brenner appeared to have ready access to two emotions – passion and anger. Cary Grant basically had all of them, with the possible exception of self-love.