Don't think it's sketchy. We saw the doubt about the 8 Elite improvement over the Snapdragon X Elite (because it was yielding 4.3GHz standard, and, if that was the frequency profile in a phone, it suggested massive improvement in power - which happened). It also matches the previous rumors fwiw.
N3E to N3P gets a 5% iso-power, iso-arch boost in frequency, SME is a 5% gain or so, and after that point they need about 15% more general IPC without blowing power up.
Looking at the cache hierarchy size and room to run there to reduce data movement- they have L2 (12MB) and the SLC (8MB), and also a substantially smaller core. With the rate of improvement from Oryon V1 to V2 and where Oryon IPC is at the moment, I don't find this that unlikely - keep in mind though their phone CPU peak power is still 10-15% higher than Apple on ST, and at 10-15% less performance, so there's that.
In other words If A19 has a 10% gain or so without any power increase, and this is true, Apple will still be on top, albeit by less than ever considering the curve - this I think is pretty much guaranteed [smaller margins than ever, tho this is already true].
Anyway I would be happy to bet on a >|15% gain in performance iso-power in GB6 ST for the 8 Elite 2. 25-30% is pushing it but not insane in context.
