Is it just me or the headlights different? I think this is the standard headlight with the circular look instead of the triple L-LEDs
No, it's not just you, though part of it may be the camera-angle. Nevertheless, I think the headlights and bezel-trim ARE a little different, and, if you look closely, when they used the all-black spindle-grille on the white one, without any chrome-surround trim, the "L" Lexus emblem is noticeably lower on the all-black grille than it is in the black/chrome grille on the blue car. There also seems to be somewhat less fender-overhang on the blue car, forward of the front wheel, than on the white one.
So, I'm with you...think Lexus actually did two different prototypes here, with slightly different exterior tooling/specs, on the two front ends.