[quote=@Techspert]
<Snipped quote by Zeal>

Leone: Sweet! But why didn't we just take the clone if it's better?

<Snipped quote by Spiritblitz>

It's perfect; your name henceforth will be... Steinette.
[/quote]

Because the clone was hidden for a long while. She didn't come out until Serenity's last mission.