I think I can say, Love DNA XX was better.
Dude, Love DNAXX was fucking awful. Never before have I seen a series set in a society comprised entirely of women and yet still manage to be incredibly chauvinistic and patriarchal. Seriously, what a stupid concept. '“Oh, your men are dead are they? Have I got a solution for you! Just pretend some of your women are men so you can make sure all the discrimination and heterosexism that existed in your previous male dominated system never stops!”
I mean, I know Japan is really sexist compared to western countries and all but LoveDNAXX is just absurd. Its like the creator has never heard of feminism or gender equality and and thinks women actually just keep going along with the ridiculous system Japan has, where women are viewed as little more than obedient housewives. Yeah, cause that's totally something all the girls are in for, cause women like the kitchen so much that if the men died off they would get other women to tell them to stay in the kitchen. Its such a stupid, stupid, stupid concept.
TL:DR: Love DNAXX is stupid and sexist because it implies that patriarchy and male dominance is necessary for society to move forward and that femininity and feminine women are weak and worthless, while masculine women are freaks that exist solely to take the place of the man in a relationship and have no need to exist in a society with men in it.