Thousand Thanks, Sir, Dear Mr. bchernicoff.
From your Test at F= 1.4 both lens, My decision is to keep My Dear Sigma 50 mm F/ 1.4 and Not spend my money $ 1619 US Dollars for That Beautiful Canon 50 mm F/ 1.2 L.
No, Sir, Not worth 4 time of the cost of my old Sigma, just one stop faster and better Contrast/ Better Colors that my Old yes could not see the difference.
Thanks again, Sir for your great Job.
You're welcome! Also 1.2 is only a half stop faster than 1.4.