Is Fyodor more mature than Mori?

While Mori was afraid that Dazai would have replaced him, Fyodor has a different mindset. His mindset is more like how will he or she be useful to me. He doesn't care about getting replaced as a ringleader. Yeah. Mori is all about pure logic and he doesn't let emotions guide him. Fyodor's logical too although he's a bit more spontaneous than Mori but logic doesn't make one more mature. So is Fyodor more mature than Mori?