Likely not the x86 chip lineup. The problem is also in the software.
Apple tightly controls both software and hardware, and major Apple-provided software, such as Safari, is specifically optimized. Run Firefox on an M1, and see how much more battery it eats with the same tabs open.
Hence an Apple-only laptop has a spectacular battery life, which is reported. With real-world non-Apple software it could be a bit different, even though M1 CPU is really more energy-efficient than a mobile x86 CPU.
Apple tightly controls both software and hardware, and major Apple-provided software, such as Safari, is specifically optimized. Run Firefox on an M1, and see how much more battery it eats with the same tabs open.
Hence an Apple-only laptop has a spectacular battery life, which is reported. With real-world non-Apple software it could be a bit different, even though M1 CPU is really more energy-efficient than a mobile x86 CPU.
This is not touching the GPU anyway.