Yes, it's true that they are not exact mates. Neither are the ones made for me. I think they're WAY more interesting to look at that way, and since babies are very responsive to visual stimuli, maybe the little one due in a month will like them. Anyway, I do. I really like being able to use leftover yarn to make them.
I tossed the dime in there to give you some idea of scale, and I used the dime because I found it, and it was still in my pocket. I'm nothing if not lazy, although I DID bend over to pick up the dime. Free money is in the budget. :-)