men in general are physically "tougher" (ie stronger, bigger) than women.
When our son died, my husband went back to work after 2 weeks, whereas i am still off after 3 months - this says to me he is emotionally "tougher" than me at the moment.
I have been through 12 operations since i was 30 and been in a fair amount of pain, whereas he feels pain very much just knocking his leg, therefore i would say i was "tougher" in relation to pain.
I go to bed reasonably early and get up resonably late, whereas he just keeps going. In endurance he is tougher than i am.
Whether this goes for all men/women though i doubt very much