A zebra of a different color? (pics)

[dcarch]

I planted four Green Zebras. Now they are setting fruit. but one of them is very different, while leaves are more or less the same, the fruits are twice the size and do not have the typical zebra look.

I don't think this is a mutation.

I know that I didn't make a mistake in planting them. How often do seed companies make mistakes?

dcarch