You are cherry picking. The last first: He wasn´t able to beat a number of East African lightweighters on an extremely hilly route in Aarhus 2019. This has nothing to do with what he can do in a normal XC route or in a track 10.000m
Have you ever watched his last XC win in Turkey 2024?
This race shows clearly that he is completely superior to Ndikumwenayo and Almgren who both have run around 26:50 in the 10k. :
The 2024 XC race was initially front run by one of the best British runners in an honest pace.
About 17.5 minutes in Jakob goes to the front and immediately start to gap the field apart from Crippa, Ndikumwenayo, Kimeli, Schrub and Almgren. But these top runners have to fight to hang on to Jakob who is still cruising.
About 700m out the 5 top runners are about to be gapped as well: Crippa 1 sec behind, Ndik, 2 sec, Kimeli 3 sec, Schrub and Almgren 6 sec.
On these last 700m he takes further 7 sec on Crippa, 13 sec on Ndik., 14 sec on Kimeli, 12 sec on Almgren and 13 sec on Schrub.
As I wrote recently on another thread: This can only be explained by a far superior AEROBIC capacity because Jakob of course is not 7-14 sec faster than his competition in a 700m race.
In my opinion this is a clear indication that Jakob in top shape would be significantly stronger than Ndikumwenayo and Almgren in a 10000m on the track.
My Norwegian friend "curiousdude" will disagree claiming that the other guys had a bad race and that it would be different if the race had been a 10k and not a 7.73?m race.
But that is nonsense in my opinion. None of these European top runners were possibly in top shape in December last year but that includes Jakob. If he had not got his achilles problems he will possibly have peaked at the WC in Tokyo as Kimeli, Almgren and Gressier did.
And Jakob would have destroyed the field also if it had been a 10k as he did in the Euro XC 2021 and 2022. In 2021 he destroyed Gressier with 19 seconds over the last kilometers.
So he has destroyed no 1 and 3 at the WC Tokyo 10,000m over the distance.
He hasn´t competed against Kejelcha in the 10,000m/ 10k BUT I think we can conclude from the above that Jakob can run a world class 10,000m AND he has beaten Kejelcha rather easily in the two 5000m finals they have competed in so I think there is quite evident that Kejelcha also would get a hard time in the 10,000m against a Jakob in top shape.