Some of the early designs had steel tops, painted.
Eventually they got nicely cut aluminum with a nice finish, and the bad finishes were sold in black.
The new change is to eliminate the screws on the top and make it easier to assemble.
Sadly, the nice looking aluminum tops are gone, they're painted again. Not cnc but stamped now, still aluminum I think.
New color for silver, so you probably won't match. However, the consistency of the aluminum was not very good from year to year. Still pretty amazing looking gear for those who care about that.
I enjoy having the mini-metal boxes on my desk. I think they look cool.