I now have everything in silver precisely because with the Space Grey... it was a lottery.
I had the iPhone 6, iPad Air 2, MacBook Pro 13" 2016 and Apple Watch S2 in Space Grey and none were the same.
Then I switched to silver (I have the Watch S4 and 12 Pro Max in silver steel, and the iPad Pro and iMac in silver) and my toc with the colors went away.