the Dimensity 9300 only using Cortex X4 and Cortex A720 cores is kinda wild. yes there is 2 versions of the CortexA720, a perf optimised and an area optimised one, but even so, only having those will be interesting to see a base idle power draw
I think Google can go with configuration such as :-
CortexA720 x4 & Cortex A520 x 4 coz Pixel ain't meant for performance centric so through this they achieve good efficiency!