Are long term OWYM relationships more stressful for ladies?

Hi,
Dear girls who are into serious relationships with much younger men, no matter if you were seeking them or they've come out shining spontaneously, do you find such liaisons more stressful than the ones with the guys of your age in general?
If so, what's the actual reason for the relationship anxiety?
If not, can you say that most of long term relationships are positive without regard to the age?
Ah, and good luck in new year!