The other one has different printing on it:
Spoiler:
Yes, I know what they are, and yes, I did find them in the trash. I work at an electronics recycler. There are three of them; one is typewriter-layout, two have APL tripleshots, and one has the Attribute Select keys; a keyboard enthusiast coworker took the typewriter one. Tips for cleaning are appreciated, as is anyone with a spare xwhatsit controller who wants to sell!