Your underside grey might stand to be a trifle lighter, but I don't trust the colour values in that photo I linked; I think they're way off reality. You got it closer than the photo did

The more I look at those two photos, the more I think that the problem is the nose wheel fork. In the -2 it's almost horizontal, and in the -3, it's closer to vertical. The difference must lie in the shock absorber strut rather than the length of the nose strut. In the -3 it's either longer, or kept at higher pressure which forces the fork to tip further down.