Many times its hard to identify a small plant by leaf.
I thought i would share these picture as these plants wont be here much longer as example.
Both were dug out of soil of the same parent plant the larger one slightly older and much different leaf shape as example.
Terra cota pot plant is same in both pictures along with its sibling in other.

Both were dug out of soil of the same parent plant

Do you mean that they self seeded?  Or they grew from the roots of the parent?

If they're from seeds, then they could be different varieties, and so the reason the leaves are not the same.

These were coming off the parent plant and cut and potted.
I have never gotten a seeded plant in my containers in my climate.