It's different with both siblings.

Two of my siblings, 14(f) and 12(m) both share the same zodiac sign and were born in different months. And as you people who knows a thing or two about zodiacs is that they act differently. For an example, when some or most people think of Scorpios, they would think about the month October. Or when thinking about Aries, they would think about the month of April. (I think these two are more generalized rather than March Aries and November Scorpio).

These two siblings, born in late April(m) and early May(f), and as an February Aquarius, I get along better with my little sister than my little brother.
For some reason, (Speaking in stereotypes) it kind of feels like April is Aries season and Aries season alone because my little brother seems to become impulsively angry 24/7. It's to the point where there's constant arguing, insults, disobedience, etc. Meanwhile my little sister and I, it's a bit rocky. She loves me but doesn't want to show it. We've been staying off each other's asses, and I decided to let her do her since she lacks discipline and will literally use you for your money, and use you in general.
I'm trying to be a mature sister where I take every joke (even though those jokes seems like a bully's remark).