corsair vengeance 5200

I bought a Corsair Vengeance DDR5 non-RGB kit last year(5200 MHz) and got another recently(5200 MT/s). The serial numbers for both sticks are the same: CMK5X16G1B52C40A2-CN. But they are visually different. The older one is matte dark grey whereas the new one is glossy black. I forgot the Cas...