I have met women who at first have the family to support them, many friends, lots of hobbies, even golf, that one day will admit that the loss is so great that life is all but intolerable. Sharing of grief, regardless of gender is the same. Given time, and a safe environment, people will tell their story. It is only then that the listener can begin to understand what the loss means to the other person. Grief is expressed in ways that are extremely personal.
Bereaved folks can relate to the grief of others.
However, I have yet to meet anyone who fully understands another's grief and this is to be respected. In my experience, the grief of both sexes is the same but sometimes the way it is expressed would lead one to assume it is different. Men will regret the loss of the cook and women will miss the bill payer, car fixer and so on. These are not expressions of grief, rather, they are regrets of loss. Not all marriages are made in heaven but the loss of a long term partner, regardless of the circumstances, is tragic.