In everyday life, people tend to have a different approach to those they consider their equals from that which they assume with people they consider higher or lower than themselves in the social scale.
In everyday life, people tend to have a different approach to those (whom)they consider their equals from that which they assume with people (whom) they consider higher or lower than themselves in the social scale.
whom 在定语从句中都做了consider的宾语(前者相当于为consider whom their equals双宾语的用法, 后者相当于consider whom higher or lower宾补的用法)