>>534182932
>so it's better
Technically no. Because Alice's sig i slightly better. (which is the question you asked)

But from a waste point of view:
It's a waste of rources to buy Alice's sig.
Because if Alice has Alice sig, then Jane is STILL off field, she can still not use hr own Sig engine. She will still be better off with Weeping Gemini.

And so, suddenly you have no one who wants to use Jane's sig.
That's why it's best to skip Alice's sig, this waay your Jaan Sign won't go to waste.