Keep in mind that 1401 was reassigned to Spencer Shops from Pegram Shops in 1945 and was likely "Spencerized". Quoting Spencer's white trim scheme: "sides of running boards,platform under smokebox, bottom edge of pilot, and tires of wheels [or in some cases aluminum, not white]. Wheel centers were not painted white at Spencer."
.....from TIES Engine Spotting features.
I expect we are viewing #1401 at different dates as decorated and trimed by two different Shops. Additionally, a third Shop, Alexandria Shops at D.C., did the final dress up of #1401 for its Smithsonian debut---not Spencer Shops. The conventional wisdom at Spencer was that #1393 was earmarked for display at the Smithsonian since she had been one of the Harrision Crescent Limited engines. In 1953 Spencer had cleaned painted and mothballed #1393 for that purpose and for static display on the Shops grounds temporarily in connection with a Rowan County Centennial celebration.
However, "officials" in Washington had chosen otherwise and picked #1401. The story that #1401 was selected because she was the only lead Locomotive pulling President Roosevelt's funeral train to be decorated with an American flag [the train was pulled from Warm Springs Georgia to Washington by double-headed Ps-4s, two from each Division on the Eastern Lines route--Atlanta Division, Greenville, Charlotte, Danville, etc.]. Interestingly, at one time The Smithsonian showed a copy of the Army Signal Corps aerial color photos of the Funeral Train and all the various PS-4s at the head end---nary a red cab roof!