Differences between Rosso Chiaro references 599.5.190 & 20-R-190

Hello,

I own a 308 GT4 from 10/1979 . Its color is Rosso Chiaro and the code on the sticker is 599.5.190
My car was painted by previous owner about 5 years ago.

I was looking to buy water based paint, I only find the Rosso Chiaro 20-R-190 which is a little bit lighter and more orange. I tested on a sample 20-R-190 and you can see the difference with my car.

My question is : is there a difference between the two Rosso Chiaro color codes 599.5.190 & 20-R-190 ?

If yes, who would have detailed information ?

Thanks in advance for your help

Image Unavailable, Please Login

Image Unavailable, Please Login

Obvious under neon light !!
Image Unavailable, Please Login