Which type of measurement provides an "apples-to-apples" comparison between carriers of differing bandwidths?

The "apples-to-apples" comparison between carriers of differing bandwidths is effectively provided by the constant power per hertz measurement. This approach allows for a fair evaluation of the power levels in relation to the bandwidth being used by each carrier. By normalizing power relative to bandwidth, this measurement enables comparisons that account for the varying frequencies and how they utilize the spectrum.

Using constant power per hertz makes it possible to understand how efficiently each carrier is using its available bandwidth, as you can assess the power density across different carriers. This is particularly useful in telecommunications and other fields where bandwidth usage can significantly affect performance and efficiency.

In contrast, average power measurement, peak power measurement, and root mean square power measurement do not take bandwidth into account, which can lead to misleading comparisons across carriers with different bandwidths. These measurements reflect power levels but lack the necessary context to provide a direct comparison without considering the respective bandwidths.