I'm mostly looking at AArch64, so they're the same there :) I'm using this to collect code coverage information, so I have the disassembly, and it's slightly easier to report it that way; if you think it'd be more useful on other architectures to report the byte range instead, it'd be an easy change to my scripts.
Also, noticed I accidentally deleted the first line of the commit message when I updated the patch... I can fix that if you want me to switch the size metric.