First page is some octaves, scales, chords, and tremolos.
Coordinationally this is quite advanced, obviously, but it would have to be played at an extreme tempo to compare with Rudenko's 10/2.
No single figuration is really extended much at all, so technical 'sleeps' are afforded, where one area of mechanique is used, then rested to allow another.
The second example has scales and unusual double-note figurations in both hands.
To play this type of figuration at any kind of impressive speed, it would have to be memorised and ingrained in the fingers.
The likelyhood and practicality of doing this is extremely minimal, so I would assume even Powell does not fully realise the potential of this passage in any of his performances/recording.
You haven't convinced me of anything, only your perpetual ignorance.