Read the comparison
Mapped characters have a direct key or modifier combination in the selected reference. Unmapped characters are reported separately, so an incomplete mapping cannot silently look more efficient.
Same-finger pairs count consecutive mapped letters assigned to the same finger on different keys. Repeated letters on one key are counted in key frequency, but excluded from that measure.
Use a representative sample
Compare layouts with the same writing, language or code sample. A prose sample and a punctuation-heavy code sample can produce different distributions.
The finger table uses conventional QWERTY physical-position assignments for row-staggered keyboards. Change your sample or choose an arrangement to inspect its effect; these counts describe the sample, rather than predict personal speed.