@kittriana
They bother about these varieties because each has their own characteristics, same with human.Some are sun tolerant, some are not, so knowing their characteristics is important. Anyway, in biology world, that is normal, but for ordinary people like us its kind of new & interesting & amazing(although I'm not sure about you๐๐)โ๏ธ
@purpleinopp
They are both mature leaf of 2 different type of syngonium, and the 2nd pic the leaves are all green with a hint of lighter green veins in the middle.
Pic above is another mature form
2nd pic is I think what you call juvenile form?
3rd pic is the leaf of that very 1st pic above, unfurling.