maybe this may help
i think skah in '94 was worth close to 12'55 ( off his devastating 13-flat which was still more a tactical race than just a pure tt ) & close to 27-flat ( he didn't run many tt over 10k but was the olympic champ ! )
line of fit of maybe :
51.7 / 1'49.1 -> 3'34.3 , 4'51.6 , 7'29.9 , 12'56.1 , 27'03.4
for geb in '94, maybe
52.1 / 1'49.6 -> 3'34.7 , 4'51.9 , 7'29.7 , 12'54.3 , 26'56.0
he only had a ~ 27'15pb back then, but it's pretty obvious in retrospect he was worth sub-27 at the time
it's possible geb was close to 0.5s slower over 400 & that showed on that last lap of that 13'00 skah win
if perhaps nearer 12'55 pace, it may have been different result
note, i do reckon the moses of '92 was better kicker than both - he ran 7'28.9wr & a 13'01 off a derisory pace for 3k & storming last 2k - he was worth at least 12'55 that day with proper pacing to 3k
51.0 / 1'48.0 -> 3'32.7 , 4'49.9 , 7'28.0 , 12'54.2 , 27'03.3