It will be based on A14.
But it won't be A14X.
The Mac needs its own silicon. Not an iPad silicon. Srouji said it.
He says tomato she says tomato...
It will be derived off A14. As in 'based' off. Yes.
A core tech' which can be phone A14, pad A14x or Mac 'AS.' AM. (Apple Mac?). ? AS as a stand in for now. It's what they used in the WWDC announcement. But a more specific name than that? Maybe. Apple knows.
With each...their own...nom de plume.
Azrael.