Did a comparison pic of those tiles around the "Q Tail". Both Tile #1 and Tile #2 (the "Q Tail" tile) look the same in both.  Tile #1 with it's "color fade" effect, and Tile #2 remaining a fairly solid block of color. But #3 and #4 show increased lightening of color, particularly #3 which serves to reinforce the "Q" effect of Tile #2. Obviously lighting can change the appearance of surfaces like this, and we're seeing two extremely different lighting schemes here. One producing a lot of reflectivity and visual noise and the other producing a sombre mat-finish, non-reflective effect. Also, post-processing on the Ford pic may have bumped the contrast of the floor colors as they tried to draw more usable information out of it. If it's a real, intended bit of symbolism (ie: someone on the Q Team had a hand in the presentation) then some well-placed but subtle light may have been arranged to bleach Tile #3 enough to emphasize the Q Effect. Certainly if you squint and focus on the center, you can kind of see that the lights on the Bush casket aren't a perfectly geometric circle. So it's not a single source, rather an array of lights directed towards the middle of the rotunda. If it's accidental, then it's even weirder tbh as Tile #3 is substantially different in each pic (even given the above thoughts on lighting/post effects). So it would be entering the spooky realm of Meme Magic where "Kek willed it" or similar.