Obviously a maturity gap both physically and experience wise.
DL has much stronger hip strength regardless of age difference. On a xc course, the world class steepler looked totally,physically in command. Jane ran her best and did a heck of a job as an 18 yo undeveloped athlete running to win, not for 2nd.
I think the women are ready and can run 8k and maybe 10k someday at the championship level. I dont think that would have made any difference today. I do think Jane would fare much better at 10k but she wont get that chance in XC during her 4 hrs.