The smirking face usually signals selfโconfidence, mischief, or teasing; people drop it when theyโre feeling smug or hinting that theyโre getting away with something.
The anxious face with sweat shows nervousness or fear, often mixed with relief or trying to stay calm; people use it when something scary or stressful is happening.
Both emojis convey a clear emotional stance without words and are common in casual, informal chats.
They express opposite emotional valences: one is confident and flippant, the other is worried and stressed.