They Both look great with clearcoat, you might get a better picture of what the 2 colours look like if you bend / curve the plastic test piece before painting (and it would also help in the photos) My pick was the Tamiya also, but im sure both companies have put money & resources into getting an accurate colour. If only we had an old F1 car just laying around the garage....
Cant wait to see more!!! Cant wait to see the steering wheel with those tiny decals!!