1) Do they fit your feet well?
If yes, than no, I don't think it matters they are women's boots. I rode in men's boots for years.
2) Do your Cartels fit a men's size 6 boot?
If yes, and you have the equivalent size in a women's boot, I'd say yes, they probably will.
3) Pfft. Black and white checkered is fine! Had you said pink with purple flowers I might say keep shopping.
Don't get hung up on the "gender" of the boot. If they fit you well, that's what matters.
As for the colorway, that's all personal preference. If you hate the colorway, that's one thing. But if you hate the colorway even more because it's on a chick boot, that's something else.