Not quite the same thing. The character 子 has many different readings, meaning it is pronounced differently depending on context. E.g. 子 on its own is KO, but in the word 中性子 (chuuseishi) it is pronounced SHI. Those different pronunciations can be combined to a somewhat sensible phrase when spoken. But that phrase when written would come out as 猫の子子猫、獅子の子子獅子. So it's more of a pun than a grammar quirk. I feel like it's more related to the English "word" ghoti (fish), as it's specifically a quirk of the writing system.

But I had never seen this before and it's fascinating! I don't mean to sound pedantic, I just think it's interesting how different languages have different sorts of technical oddities.