In addition to the other great answer above, it sounds like a minor detail, but the shoes are fundamentally different too. So much was made of Kipchoge's Vapor

In addition to the other great answer above, it sounds like a minor detail, but the shoes are fundamentally different too. So much was made of Kipchoge's Vaporfly shoes and how little they weighed, and how much energy they returned during each step. Whereas trail shoes are much, much heavier, have little spring and are generally robust to protect the foot from stones and rocks. Also, going for 10 hours with minimal food or drink is pretty unusual too. You'll see Kipchoge grabbing a specific drink from a feed station especially for him. Whereas Jornet... 'drinks from a stream if I need it'.