Different madhhabs

What happens when different madhhabs differ on a ruling, like the Hanafi, Hanbali Maliki and Shafi, does that mean that in each madhhab all of its members agree and on an opinion and in the other madhhab all its members agree on another opinion? For example, if Maliki and Hanbalis differ in something, does that mean all Malakis agree in the opinion or just a few and same with the other madhhab?