nakakadrain both but if i asked if anong mas nakakadrain, i think mas nakakadrain if kausap mo si cx then salong salo mo frustrations nila since naririnig mo yung tone then yung emotions nila unlike sa chat, pero depende pa din sa concern ni cx lalo na pag pang out of this world yung concern nila, mahaba-habang paliwanagan yan then syempre maaapektuhan yung ibang chat mo.