Question, can you tell me the difference between regular Bok-Choy, Toy Bok-Choy, and Baby Bok-Choy?

I just dropped some bills on a small pack of Baby Bok-Choy seeds for Dear Wife, but she said the picture was wrong!? She insists that the Baby Bok-Choy has a green base, not white. I have been reading lots of stuff online, but it seems to me that it's all the same Bok-Choy - just picked at different times.

Also, for anyone on the thread, now that I'm getting more into gardening, I am getting frustrated with things like Bok-Choy which are also called by many other names (Pak-Choy, Chinese Cabbage, etc...) Whatever happened to using Latin scientific names on the seed packs to differentiate between types of the plant? At least with different types of tomatoes, you can see a difference in the pictures (round, roma, cherry, grape, etc...). All the pictures on the Bok-Choy seed packs look the same to me.