People were far less picky about punctuation in 1787 than they are today. I don't think anyone would have thought one comma more or less would particularly matter.
BTW, in the Constitution almost all nouns are capitalized. Should one read anything into that, or simply figure that James Madison probably liked the German convention of capitalizing nouns?
“I don’t think anyone would have thought one comma more or less would particularly matter.”
Then why put them there? No one just throws in commas for no reason. The purpose/meaning may have changed over time, but they are there for a reason.
Hmmm, I, think, I’ll, just, comma the, hell, out, of this, sentence, for, fun.
There is one difference. The U.S. Constitution refers to "Citizens of a State" or "citizens of the United States" to make a distinction between the two.