[quote=@BurningCold]
<Snipped quote by Aeolian>

They also seemed to have a "two sides of the coin" thing going on, at least from what I could glean of Carlyle's character from the appearance segment
[/quote]

If they were twin sisters, there would be the question of how Sara Jane wound up drugged and abandoned at a busy mall. The sparks would fly, to be sure. Best to head off that sort of drama.