which one should I make more effort and stay with?

I am a male rooster born in 1969, I am having a relationship with both females (at the same time) one is a sign of a dog (1970) and the other is a rooster (1981), they are both caring but I've discovered that a female dog sign is more outgoing, flirtatious and is likely ending up in bed with someone she met. Unlike the more incentric female rooster, she is completely the opposite character. What advice can you give and which one should I stay with in the long ru?