The early CG art of the VF-25F fighter and gerwalk modes published online and in the hobby magazines showed the VF-25F without the red and black stripes on the top of the head, just a plain white head top.
I'll have to rewatch eps 1 & 2 and the Deculture ep, again to see if I'm right, but I think when Gilliam had the VF-25F, it had a plain white head top. If my theory is correct, it wasn't repainted with the red and black head stripes until Alto joined SMS and started flying it.
Graham