First, take a deep breath.
Second, think about each woman in her own right. Don't compare them. That will accomplish nothing.
Third, get over your ex-wife first. If you still have feelings for your ex-wife, you are not going to be able to give yourself into a relationship with anyone.
Fourth, you have to determine for yourself what your feelings are about children and whether you are ready for children in your life. You have to make that decision without anyone in particular in mind. Which means make that decision without dating anyone.
Finally, I would say this - take a break from ALL dating for a while. Just chill out and heal yourself from your divorce. It is the only thing that is fair for you and for any woman you may date.
Good luck.
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