[imtringued]

> It’s likely that any MacBook bound Apple CPU won’t have such a limitation and will be able to run much faster as a result.

Geekbench is based on the unthrottled peak performance of the CPU. Increasing the TDP headroom eliminates throttling but Geekbench doesn't measure throttling.

You can perhaps increase performance by overclocking but this requires the CPU to be designed for higher frequencies. AMD's Ryzen CPUs usually top out at around 4 GHz. Intel's CPU can be overclocked up to 5 GHz. The maximum clock speed is limited by the slowest component of the CPU. If the slowest operation takes 0.25 nanoseconds to complete this limits your frequency to 4GHz. If Apple had enough foresight to design their chips with this in mind then maybe but in reality they probably optimized the chip entirely for mobile TDPs.