tapir: I am not sure we should present the main page as research results, when it is missing some variations even I see and a clear answer what happens after the placement by Black and a White hane as answer. I would rather make a tsumego collection out of it than a statement of research results (it sounds too proud for what happened on L19 and the page).
tapir: Here, Black is 4 points better than in the Segoe line, but...
In this variation White ends with only 4 points, with Black having 3 points territory less + 1 prisoner more. That is White is 1 point better off than in the Segoe solution.
Here, in another sequence after the hane, White lost all 5 points of territory, but destroyed the same amount of Black's territory. If Black can't risk a ko, and has to play at
the final result is the same.
If the outside isn't clearly Black's territory, the count is different, but obviously depends on the exact configuration... however, as the aji after the hane / hanging connection will then be more valuable, White should be even better off.
tapir: I would prefer this Seki over a living inside (Segoe variation) in many cases, because of the aji of a. White can either connect or play two moves on the outside.