IME Apple has always been the most honest when it makes performance claims. LIke when they said an Macbook Air would last 10+ hours and third-party reviewers would get 8-9+ hours. All the while, Dell or HP would claim 19 hours and you'd be lucky to get 2 eg [1].
As for CPU power use, of course that doesn't translate into doubling battery life because there are other components. And yes, it seems the OLED display uses more power so, all in all, battery life seems to be about the same.
I'm interested to see an M3 vs M4 performance comparison in the real world. IIRC the M3 was a questionable upgrade. Some things were better but some weren't.
Overall the M-series SoCs have been an excellent product however.
As for CPU power use, of course that doesn't translate into doubling battery life because there are other components. And yes, it seems the OLED display uses more power so, all in all, battery life seems to be about the same.
I'm interested to see an M3 vs M4 performance comparison in the real world. IIRC the M3 was a questionable upgrade. Some things were better but some weren't.
Overall the M-series SoCs have been an excellent product however.
[1]: https://www.laptopmag.com/features/laptop-battery-life-claim...
EDIT: added link