Confused Between Two Friends – Need Advice

I have two female friends, both very different:

1. Friend A – My Mirror She’s just like me in nature. Whatever effort I put in, I get the same back. It feels balanced and stable.

2. Friend B – My Opposite She’s the complete opposite of me, but whenever I put in effort, she gives back double. It feels surprising and rewarding

Now I’m stuck — should I choose the one who’s like me, or the one who’s opposite but gives more back? Which type of bond usually lasts longer?