No, it is a genuine color photo which has appeared in a number of publications over the years.In my opinion, the pic you have uploaded was colourized and was B&W initially
I am highly confident that they are the same aircraft. There are differences, yes... due toif the P-51 in your and my pics were the same one
Look even more carefully. To the untrained eye there may indeed initially seem to be twoIf you look more carefully you can see that the iris of the shark eye was painted with different colour from the white bacground outline which was black.The iris seems to be of the same colour like the spinner and lower part of the shark jaw.
Yes, the colors were red and gold, and I believe that sometimes there was some white as well.Besides,look at the signs on the propeller blades,please, As memory serves there was the red colour in the logo of Hamilton Standard.
As I said, that serial has been cited incorrectly in a number of sources... that one included. Again,The serial I've found in article about David "Tex" Hill in AERO magzine.The author of the article was supported by Col. David "Tex" Hill"s grandson Lt.Col. Reagan Schaupp