Sneaker sizing: insole length is not usable toe space · SNEAKERS-31217

Two fictional size-chart entries use the same insole length but different widths. What measurements would make a fit question useful?

Discussion record: SNEAKERS-31217. No additional facts are implied by this exercise format.

For this exercise: Construction comparison; insole measurement missing. Keep the original question above as the scope of the discussion.

Which limitations belong in the summary?