When people say "semantics," they usually use it to dismiss a difference in description as a meaningless distinction. Is that what you meant?
Never! Everyone will have a different "concept" - no matter what the subject.
Say the word "Ice Cream"
One person immediately visualizes ice cream in a cone.
Another thinks ice cream sundae smothered in sauce.
A third person will visualize the act of scooping out a ball of ice cream.
I imagine most people will visualize white ice cream.
Generally but not always, when I say semantics I am merely implying that everyone has their own concept of meaning.