The vibes of the two shows are quite similar. Both shows feature female leads, who have a love/hate relationship. There's a constant push and pull. You don't know whether they will help (or kill) each other next.

-2 male leads end up "adopting" a young girl
Voice of Silence is a lot more poignant and sad. Meanwhile, Pawn had its comedic and happy moments.

Similarities:
*The main character is a single father and he has a son.
*The son seems to be drawn and grows fond of the female lead.

Similarities from Ep.1:
-The present version of the female lead is an opposite version of the past. Both Ban Hani (Hello, Me!) and Zhen Xin (Our Times) are so different from their old selves.
-It starts out in the present time then shifts to the high school years of the female lead's life.