The answer can be dependent on the individual more than the gender, However, there are some differences. Both sexes have distinct traits and biological functions that identify their personalities. Females tend to be moodier, and males more affectionate. Although males are mostly more aggressive, this is not true of all the breeds. When you have more than one cat or dog, opposite sexes get along better than having the same sexes. They see each other as less of a threat when it comes to mating and status within the social pack. Nevertheless, owners must keep in mind that in the end, it's all about personality regardless of sex since every pet has its unique character.