☺️улыбаетсяA classic plain smile. Conveys simple, sincere happiness — warm but understated, a step softer than the emoji grins.
😊довольно улыбаетсяA smiling face with closed, smiling eyes. Conveys warm, genuine happiness, friendliness and contentment — gentler than the wide-open grin.
🙂слегка улыбаетсяA slightly smiling face. Conveys mild positivity — in some contexts, a polite or passive-aggressive neutral smile.