Dollars per square foot is a common trap people fall into with all the information available. IF, all other factors are comparable, lot size, age of the home, quality of the finishes, builder, just to name a few, it begins to have relevance.
I sold a luxury home for a lower $perSqFt than a starter home and they were 2 blocks apart. One went for nearly $1,300,000 the other for under $400,000.
When I do a CMA to determine value this is a consideration, but only one of many. Please don't get hung up on this, for your own benefit.