Not sure a defeat by ten...
Kurtz would have had a tac ride and Harris did take two of Boughen's rides, when he would only have been able to take one max otherwise...
(Was that legal by the way as IRR wouldn't have been in place?)
But, that is sport, and particularly in one that requires a level of mechanical capability from the competitors, you could counter argue that the meeting was lost in the preparation of certain riders ..
All things being equal though, KL would have won I would say...
But closer given one more ride for Boughen and a Tac ride for Kurtz, (probably with Lidsey)...