Neither of the above are me.
So I only started doing upper chest focused exercises a fair bit after I started training chest and so my mid and lower chest are currently stronger than my upper chest and I’m working on bringing my upper chest up to par with my mid and lower sections.
One thing I’ve noticed though is that my upper chest is thicker on the sides near my shoulders (areas circled in green) whilst my mid upper chest (areas circled in blue) is a fair bit thinner. Does anyone have any suggestions as to how I can target my mid upper chest?