G1 jetfire Legs colour contrast

[gdmetro]

I am trying to figure out if a fresh mint original jetfire did have a subtle contrast in white on the legs. On my jetfire, the diecast painted white is much brighter in white than the rest of the plane's white which next to it looks slightly creamier. I am leaning towards that this is what it is suppose to be.

I thought it might be slight fading on mine, but the rest of the plane's white is uniform. I looked at shots of MISB jetfire and the contrast is there. Can any experienced g1 guys let help me out?

Thanks!