galactic gray and old cocoa comaprisson

Hi.

As the title writes, what is the difference between thoose two colors? Can you provide some photo comparisson? I may not realize the difference since I am litle bit colorblind. I can asume some specific tones and variatons of colors same unless two objects/pictures are next to each other for comparisson. I guess they are not same colors so not like in famous meme picture. I like both of the mentioned colors.

Lets discuss. 

Thanks.