Is this eucalyptus a variegated leaf ?



Botanical Name: Eucalyptus aromaphloia

Common Name: Scented bark / Creswick apple-box

I cultivate Aromaphloia in two flowerpots.

One of them,
Leaf of the original Aromaphloa.

The other is

When it was small, it was the leaf of the same shape, but shapes came to be different as it became big.

Is it a mutation?

It's a roundish leaf.

Long time was necessary for this eucalyptus's changing into a variegated leaf.

I noticed recently.