If a new home console releases with multiple skus simultaneously, the stronger will be the one counted.
No it won't. This gen, a 0.5TFlop (1.8 vs 1.3) difference made a noticeable difference in the end. With next gen, a 0.5TF difference will be almost unnoticeable (don't expect a higher difference than 0.5-1TFlop, as both fight within the same power envelope). If/when both consoles are around 10TFlop (of "Navi - TFlops"), a few % difference just doesn't cut it.
It will boil down to "Who shouts louder?" and who has the better exclusives.