I don’t think this question can really be answered because it’s so broad. You can’t really ask any question about “women” in general because, like men, they’re all very different. I’m sure there are plenty of men that love their women more than their women love them. I’m also certain there are plenty of relationships in which the women love their men more than their men love them. Cheaters are mostly men, after all, and you don’t cheat on someone you truly love (don’t argue with it, it’s damn true).
I do think that most men love more deeply than they let on, while women often have their heart out on their sleeve. The women might not know how deep their man’s feelings for them really go, making it hard for them to love as deeply. But all of this is trivial, because there’s no way to measure love.
I do think that women save their love for their children more than men do, generally speaking. A woman is way more likely to give up her husband for her kids than her kids for her husband, and I think that’s how it should be when the children are young. Adult children, however, can betray you just as much as your partner can, no matter what @dappled_leaves may think. I’ve seen it happen, and the person I’m thinking of chose her grown kid over her husband. But like I said, you can’t say this about all women, or even most of them. Who says one love is “greater” than another?